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What is componendo and dividendo method? Plz explain.
cos20.cos40.cos80=1/8
Prove that.....Tan 70 = tan 20 + 2 tan 50...
Solve Sinx + Sin3x + Sin5x = 0.
sin 20 sin 40 sin 60 sin 80=3/16
solution of ml agarwal for isc 11std
The chapter trigonometry in RS Aggarwal book (of class 11th) is divided into 6 sub-chapters. But its chapter 5 ( Solution of triangles ) and 6 ( Graphs of trigonometric functions ) are not the topics of NCERT Book.
Now my question is: Should I study these two chapters (5 &6 of RS Aggarwal) as these are not in NCERT Book?
prove the following :
root 3 cosec 20 - sec 20 = 4
can we find the value(in degrees) of tan(4/3)
prove that tan20 .tan40.tan80=tan60.
sin4x+cos4x=1-2sin2xcos2x
cos2x + cos2(x + pi/3) + cos2(x - pi/3) = 3/2. prove
cot(2pi+x)=?
cotx cot2x - cot2x cot3x-cot3x cotx=1
sinA . sin(60-A) . sin(60+A) = 1/4 sin3A
if sin alpha + sin beta= a and cos alpha + cos beta= b, show that
1. Sin(alpha+beta)= 2ab/a sq.+b sq.
2. Cos(alpha+beta)= b sq.-a sq./b sq.+a sq.
prove that cos20 cos 40 cos 60 cos 80=1/16.
cos 2x cos 2y + cos^2 (x+y) - cos^2 (x-y) = cos(2x+2y)
prove that cos 10.cos30.cos50.cos70 = 3/16
Prove:Cos18+Sin18/Cos18-Sin18 = Tan63Please provide me the answer for this question as soon as possible...
prove that tan 50 = 2 tan 10 + tan40
1.(1+cos pi/ 8) (1+cos 3pi / 8) (1+cos 5pi / 8) (cos 7pi / 8)=1/8
Prove that sin3x + sin 2x – sinx = 4 sinx cos x/2 cos3x/2
why the function changes on 90 degree and 270 degree. for eg. cos becomes sine and tan becomes cot.Reply fast. thnx.......
sin10*sin50*sin70=1/8?
5 tan 4x-1=4 tan2 x.find general solution
sin 105 degree +cos 105 degree =cos 45 degree
Prove the following: cosA / 1 - sinA = tan (45 + A/2)
Find the maximum and minimum values of sin^4x + cos^2x and hence or otherwise find the maximum value of sin^1000 x + cox^2008 x
cos4 pi /8+ cos4 3pi /8+ cos4 5pi /8 +cos4 7pi/ 8=3/2 prove it fast rely plssss
Can you pls find the value of Tan(-2025).
My answer was -1....Am i right???
cos4 pi / 8+cos4 3pi /8 + cos4 5pi / 8 +cos4 7pi /8 =3/2
PROVE THAT
cos3A + cos3(120+A) + cos3(240+A) = 3/4 cos3A
Tan (A+30) + cot (A-30) = 1 / sin2A - sin60°
if A+B=45 degree.show that {1+tanA}{1+tanB}=2
Prove that:
4 cosA cos(60-A) cos(60+A) = cos3A
If tanx=2tany, prove that sin(x+y)/sin(x-y)=3
in any triangleABC P.T
(b2-c2)cotA + (c2-a2)cotB + (a2-b2)cotC = 0
If x, y and z are positive real numbers, such that x+y+z=a, then
(a) 1/x + 1/y + 1/z > 9/a (b) (a-x) (a-y) (a-z) > 8xyz (c) (a-x) (a-y) (a-z) < 8/27 a3
Please give full explanation .
Prove cos5x=16cos5x-20cos3x+5cosx
If sec theta = - root 2 , and 3pi/2
Urgent. pls. Thnx.
prove that cos11+sin11/cos11-sin11=tan56
prove using sine rule - 1) sin ( B-C)/2 = b-c/a cos ( A/2)
2)1+cos(A-B) cos C / 1+cos(A-C) cos B = a2+ b2/ a2- c2
3) (b-c)cot (A/2) + (c-a)cot (B/2) + (a-b)cot (C/2) = 0
4) a cos(B-C/2) = (b+c) sin(A/2)
5) c/(a-b) = tan(A/2) + tan(B/2) / tan(A/2) - tan(B/2)
6) a(cos C - cos B) = 2(b-c) cos^2 (A/2)
A denotes the product xyz where x, y, z satisfy
Log3x=log5-log7
Log5y=log7-log3
Log7z=log3-log5
Find A??
show that tan3x-tan2x-tanx =tan3x*tan2x*tanx
IF cos(alpha + beta) = 4/5 and sin(alpha - beta) = 5/13
FIND THE VALUE OF tan 2 alpha, where 0 is less than equal to alpha is less than equal to pie/4.
plz reply!!
Prove that tan4x= (4tanx(1-tan^2x)) / 1-6tan^x+tan^4x
1) cos 160 degree + sin 70 degree = 0
2) cos 25 degree .tan 65 degree .cot 115 degree .sec 155 degree = 1
3) sin (A + B) + cos (A - B) = (sin A + cos B) (sin B + cos B )
a tree stands vertically on a hill side which makes an angle of 15degree with the horizontal. from a point on the ground 35m down the hill from the base of the tree, the angle of elevation of the top of the tree is 60degree. find the height of the tree.
ans(35root2m) plese tell the xact solution
Solve the equation:
4sinxcosx + 2sinx + 2cosx + 1 = 0
Show that cos 24 + cos 55 + cos 125 + cos 204 + cos 300= 1/2
prove-
cos2(pi /8) + cos2 (3pi / 8) +cos2(5pi / 8) +cos2 (7pi / 8) = 2
If A+B+C = pai, prove that
sinA + sinB + sinC = 4 cosA/2 cosB/2 cosC/2
find the derivative of cotx by the first principle?
The angles of a triangle are in AP and the ratio of the number of degrees in the least to the number of radians in the greatest is 60:π. Find the angles in degrees and radians.
prove sin2A - sin2B/sinA .cosA- sinB. cosB = tan(A+B)
Prove that : cosA cos2A cos4A cos8A =sin16A / 16sinA
The large hand of a big clock is 70 cm long.How many cms. does it's extremely move in 6 minutes time.
Please explain working
prove that 1+cos2x+cos4x+cos6x= 4cosx cos2x cos3x.
EVALUATE cos(-1125)
if a 12 cos 2x +5 sin 2x +6 b , then find the value of (a,b)
Solve sin2x+sin4x+sin6x=0
prove that
cos20cos40cos60cos80 =1/16
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Syllabus
What is componendo and dividendo method? Plz explain.
cos20.cos40.cos80=1/8
Prove that.....Tan 70 = tan 20 + 2 tan 50...
Solve Sinx + Sin3x + Sin5x = 0.
sin 20 sin 40 sin 60 sin 80=3/16
solution of ml agarwal for isc 11std
?
The chapter trigonometry in RS Aggarwal book (of class 11th) is divided into 6 sub-chapters. But its chapter 5 ( Solution of triangles ) and 6 ( Graphs of trigonometric functions ) are not the topics of NCERT Book.
Now my question is: Should I study these two chapters (5 &6 of RS Aggarwal) as these are not in NCERT Book?
prove the following :
root 3 cosec 20 - sec 20 = 4
can we find the value(in degrees) of tan(4/3)
prove that tan20 .tan40.tan80=tan60.
evaluate the following;
a)cos 1050 degree
b)cosec (-585 degree)
c)cot 495 degree
d)tan 120 degree
sin4x+cos4x=1-2sin2xcos2x
cos2x + cos2(x + pi/3) + cos2(x - pi/3) = 3/2. prove
cot(2pi+x)=?
cotx cot2x - cot2x cot3x-cot3x cotx=1
sinA . sin(60-A) . sin(60+A) = 1/4 sin3A
if sin alpha + sin beta= a and cos alpha + cos beta= b, show that
1. Sin(alpha+beta)= 2ab/a sq.+b sq.
2. Cos(alpha+beta)= b sq.-a sq./b sq.+a sq.
prove that cos20 cos 40 cos 60 cos 80=1/16.
cos 2x cos 2y + cos^2 (x+y) - cos^2 (x-y) = cos(2x+2y)
prove that cos 10.cos30.cos50.cos70 = 3/16
Prove:Cos18+Sin18/Cos18-Sin18 = Tan63Please provide me the answer for this question as soon as possible...
prove that tan 50 = 2 tan 10 + tan40
the sum of two angles is 80 grades and thier diff. is 18degree fimd the anglea
1.(1+cos pi/ 8) (1+cos 3pi / 8) (1+cos 5pi / 8) (cos 7pi / 8)=1/8
Prove that sin3x + sin 2x – sinx = 4 sinx cos x/2 cos3x/2
why the function changes on 90 degree and 270 degree. for eg. cos becomes sine and tan becomes cot.Reply fast. thnx.......
sin10*sin50*sin70=1/8?
5 tan 4x-1=4 tan2 x.find general solution
sin 105 degree +cos 105 degree =cos 45 degree
Prove the following: cosA / 1 - sinA = tan (45 + A/2)
Find the maximum and minimum values of sin^4x + cos^2x and hence or otherwise find the maximum value of sin^1000 x + cox^2008 x
cos4 pi /8+ cos4 3pi /8+ cos4 5pi /8 +cos4 7pi/ 8=3/2 prove it fast rely plssss
Can you pls find the value of Tan(-2025).
My answer was -1....Am i right???
cos4 pi / 8+cos4 3pi /8 + cos4 5pi / 8 +cos4 7pi /8 =3/2
PROVE THAT
cos3A + cos3(120+A) + cos3(240+A) = 3/4 cos3A
Tan (A+30) + cot (A-30) = 1 / sin2A - sin60°
if A+B=45 degree.show that {1+tanA}{1+tanB}=2
Prove that:
4 cosA cos(60-A) cos(60+A) = cos3A
If tanx=2tany, prove that sin(x+y)/sin(x-y)=3
in any triangleABC P.T
(b2-c2)cotA + (c2-a2)cotB + (a2-b2)cotC = 0
If x, y and z are positive real numbers, such that x+y+z=a, then
(a) 1/x + 1/y + 1/z > 9/a (b) (a-x) (a-y) (a-z) > 8xyz (c) (a-x) (a-y) (a-z) < 8/27 a3
Please give full explanation .
Prove cos5x=16cos5x-20cos3x+5cosx
If sec theta = - root 2 , and 3pi/2
Urgent. pls. Thnx.
prove that cos11+sin11/cos11-sin11=tan56
cosec x- cosec 2x = cosec4x
prove using sine rule - 1) sin ( B-C)/2 = b-c/a cos ( A/2)
2)1+cos(A-B) cos C / 1+cos(A-C) cos B = a2+ b2/ a2- c2
3) (b-c)cot (A/2) + (c-a)cot (B/2) + (a-b)cot (C/2) = 0
4) a cos(B-C/2) = (b+c) sin(A/2)
5) c/(a-b) = tan(A/2) + tan(B/2) / tan(A/2) - tan(B/2)
6) a(cos C - cos B) = 2(b-c) cos^2 (A/2)
A denotes the product xyz where x, y, z satisfy
Log3x=log5-log7
Log5y=log7-log3
Log7z=log3-log5
Find A??
show that tan3x-tan2x-tanx =tan3x*tan2x*tanx
IF cos(alpha + beta) = 4/5 and sin(alpha - beta) = 5/13
FIND THE VALUE OF tan 2 alpha, where 0 is less than equal to alpha is less than equal to pie/4.
plz reply!!
Prove that tan4x= (4tanx(1-tan^2x)) / 1-6tan^x+tan^4x
1) cos 160 degree + sin 70 degree = 0
2) cos 25 degree .tan 65 degree .cot 115 degree .sec 155 degree = 1
3) sin (A + B) + cos (A - B) = (sin A + cos B) (sin B + cos B )
a tree stands vertically on a hill side which makes an angle of 15degree with the horizontal. from a point on the ground 35m down the hill from the base of the tree, the angle of elevation of the top of the tree is 60degree. find the height of the tree.
ans(35root2m) plese tell the xact solution
Solve the equation:
4sinxcosx + 2sinx + 2cosx + 1 = 0
Show that cos 24 + cos 55 + cos 125 + cos 204 + cos 300= 1/2
its urgent tomorrow is exam
prove-
cos2(pi /8) + cos2 (3pi / 8) +cos2(5pi / 8) +cos2 (7pi / 8) = 2
If A+B+C = pai, prove that
sinA + sinB + sinC = 4 cosA/2 cosB/2 cosC/2
(i) sin(-65)
(ii) cot(-1054)
(iii) tan 1145
(iv) sec 1327
find the derivative of cotx by the first principle?
The angles of a triangle are in AP and the ratio of the number of degrees in the least to the number of radians in the greatest is 60:π. Find the angles in degrees and radians.
prove sin2A - sin2B/sinA .cosA- sinB. cosB = tan(A+B)
5. If tan is rational, which of the following quantities are necessary rational ?
Prove that : cosA cos2A cos4A cos8A =sin16A / 16sinA
The large hand of a big clock is 70 cm long.How many cms. does it's extremely move in 6 minutes time.
Please explain working
prove that 1+cos2x+cos4x+cos6x= 4cosx cos2x cos3x.
vii) cosec (-7498°)
EVALUATE cos(-1125)
if a 12 cos 2x +5 sin 2x +6 b , then find the value of (a,b)
Solve sin2x+sin4x+sin6x=0
prove that
cos20cos40cos60cos80 =1/16