Question

need exp pls help mates​

Answer 1

sin(90-A) = cos(90-A)

=> CosA=sin A

=. 45°

=. A=45°

Answer 2

Hey there!

Answer:

∅ = π / 4

Step-by-step explanation:

Given,

Sin(90 - ∅) = cos (90 - ∅)

⇒ cos ∅ = sin ∅

⇒ 1 = sin ∅ / cos ∅

We know,

sin ∅ / cos ∅ = tan∅

Then,

1 = sin ∅ / cos ∅

⇒ 1 = tan ∅

or, 45° = ∅

or, π / 4 = ∅

or, ∅ = π / 4

Hope IT Helps You!