Question

111)
cosec (90° – 0).sin(180° — O) cot(360° – 6)
sec(180° +0) tan (90° +O) sin(-0)
= prove that ​

Answer 1

Answer:

L.H.S.=

cos(90∘+θ)sec(-θ)tan(180∘-θ)

sec(360∘-θ)sin(180∘+θ)cot(90∘-θ)

 

= (-sinθ)secθ(-tanθ)

secθ(-sinθ)tanθ

 

=-1=R.H.S.

Explanation: