Question

Find the mean of x,if 4sin square theta plus sin theta minus 1

Answer 1

4 sin²θ = 1

sin²θ = 1/4

sinθ = 1/2

So, θ= 30° (Sin 30 = 1/2)

We need,

cos²30 + tan²30 = 3/4 + 1/3 = 9+4/12 = 13/12

Hope this helps!