evaluate : 2 cos square 60 + 3 sin square 45 - 3 sin square 30 + 2 cos square 90
2 cos 2 60 + 3 sin2 45 - 3 sin2 30 + 2 cos2 90
= 2( 1/4) + 3 ( 1/2) - 3( 1/4) + 2 (0)
= 1/2 + 3/2 - 3/4 + 0
= 5/4
= 2( 1/4) + 3 ( 1/2) - 3( 1/4) + 2 (0)
= 1/2 + 3/2 - 3/4 + 0
= 5/4