Question

11. (i) prove that cos'o + sine = 1 - 2cos? Osin 0
(ii) Prove that
1# corte) = -tang, 22=tano.
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Answer 1

Answer:

Step-by-step explanation:

Let cos  

−1

x=θ⇒cosθ=x

LHS sin  

−1

(2sinθcosθ)=sin  

−1

(sin2θ)

                                          =2θ=2cos  

−1

x