Question

please answer this question

Answer 1

answer...................
.

Answer 2

Given, sinФ = (1/√2)

⇒ sinФ = sin 45

⇒ Ф = 45.

Given:

⇒ cosФ

⇒ cos(45)

⇒ 1/√2.

Therefore, the final answer is (1/√2).

Hope it helps!