Question

15 points for 3 questions hurry
please solve with easy steps....

Answer 1

here is your answer ⬆⬆⬆⬆⬆⬆

hope it helps

plz mark as brainlist

Answer 2

14. cos(90- 3A)= cos(A-26)

cos gets cancelled. so,

90-3A= A-26

4A= 116

A= 29.

15.From the question,

2 sin²Θ - cos²Θ = 2

2 sin²Θ - 2 = cos²Θ

From the Identity ⇒ sin²Θ + cos²Θ = 1

2(sin²Θ - 1) = cos²Θ

2(- cos²Θ) = cos²Θ

- 2 cos²Θ = cos²Θ

3 cos²Θ = 0

cos²Θ = 0

From the Trigonometric table cos 90° = 0 ⇒ cos² 90° = 0

Then, cos²Θ = cos² 90°

Cancelling cos²Θ on both sides, Θ = 90°

hope it helps!