Given that sinθ = 0.515 where 0 < θ < π 2 , find cosθ. Since θ lies in Quadrant I, where cosθ > 0, cosθ

Question

this is exactly how its asked on  my paper please help

Answer 1

1)

Use your calculator to determine

arcsin 0.515 = θ

then determine

cos θ 

2)

Use you knowledge of the identities

sin² + cos² = 1

0.515² + cos² = 1