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Question is proved based and from trigonometry cum algebra.

Question is proved based and from trigonometry cum algebra. 

Question Image
Grade:12

1 Answers

Santhosh
22 Points
4 years ago
Let tanx=t now secx=square root over (1+t^2) put in given rel take (c-at )one side and remain. {b× root of (1+t^2) }on other side square on both sides get a qudratic on t , tanalpha , tanbeta are the roots Use sum of roots and product of roots replace them in proving LHS side by expanding tan of alpha +beta finally u gets result

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