Question

Find the value of the expression if sin beta= 0.45, find cos(pi/2-beta)

Answer 1

If sin β = 0.45, we have to find cos ( π/2 - β ).
We know that: sin x = cos ( 90° - x ), or sin x = cos ( π/2 - x ).
For example: sin 60° = cos 30°.
cos ( π/2 - β ) = sin β = 0.45
Answer: 0.45