Question

sin (180-theta) = cos (90-theta)​

Answer 1

Answer:

sin( 180 - θ ) = cos ( 90 - θ )

⇒sin (90 + 90 - θ) = sin θ

⇒cos ( 90 - θ ) = sin θ

⇒sin θ = sin θ

⇒sin θcosec θ = 1