Question

1
show that sixlde = 1
-1​

Answer 1

Answer:

see below

Step-by-step explanation:

Let cos  

−1

x=θ⇒cosθ=x

LHS sin  

−1

(2sinθcosθ)=sin  

−1

(sin2θ)

                                          =2θ=2cos  

−1

x