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

(iii)

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

(iii)

cosec⁡α=1sin⁡(β+γ)\operatorname{cosec}\alpha = \dfrac{1}{\sin(\beta + \gamma)}

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