Prove that √3 cosec 20∘sec 20∘=4. Or If cos (α+β)=45, sin(� – InterviewSolution

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1.	Prove that √3 cosec 20∘sec 20∘=4. Or If cos (α+β)=45, sin(α−β)=513 and α, β lie between 0 and π4, find tan 2α.
Answer» Prove that $\sqrt{3} c o s e c 20^{\circ} s e c 20^{\circ} = 4$ . Or If $c o s (α + β) = \frac{4}{5}, s i n (α - β) = \frac{5}{13}$ and $α, β$ lie between 0 and $\frac{π}{4}$ , find $t a n 2 α$ .

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