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Prove that,"cosec" (2pi)/7 + "cosec" ( 3...

Prove that,`"cosec" (2pi)/7 + "cosec" ( 3pi)/7 = "cosec" pi/7`

Text Solution

Verified by Experts

The correct Answer is:
`1/sin alpha="cosec" pi/7[:. alpha = pi/7] = R.H.S.`
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