Question

cos theta(90-theta) cos theta /cot theta - 1

Answer 1

Answer:

cos²θ

Step-by-step explanation:

cos ( 90° - θ ) cos θ / cot θ - 1

⇒ sin θ cos θ / cot θ - 1

⇒ sin θ cos θ / ( cos θ / sin θ ) - 1

⇒ sin² θ cos θ / cos θ = 1

⇒ sin²θ - 1

⇒ cos²θ

Formulas used :

cos ( 90 - θ ) = sin θ

cot θ = cos θ / sin θ

sin²θ - 1 = cos²θ

Answer 2

Hey!!

Refer the attachment !!

Thanks