Theory of Intelligence
11TH•Mathematics•Trigonometric Identities•Question 6

(ii)

If $\alpha, \beta, \gamma$ are the angles of a triangle $ABC$, then prove that

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(ii)

sec⁡(α+β2)=csc⁡γ2\sec\left(\dfrac{\alpha + \beta}{2}\right) = \operatorname{csc}\dfrac{\gamma}{2}

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