Question

If cos theta = sin alpha then prove theta + alpha = 90°

Answer 1

Hey !!

Cos ∅ = Sin @

We know that the trigonometric ratios sin and cos are equal at π/4 i,e 45°

Therefore for the given equation to be true ,

∅ = @ = π/4 = 45°

Hence, Theta + Alpha = 45+45 = 90°