Question

2 cos square 60 + 3 sin square 45 - 3 sin square 30 + 2 cos square 90 evaluation

Answer 1

2 cos^2 60= 2

3 sin^2 45 = 3/2

3 sin^2 30 = 3/2

2 cos^2 90= 0

So we have

2+3/2-3/2+0= 2