Math, asked by vidurbadam, 1 year ago

2cosФ= x+1/x

Prove that: cos2Ф=1/2(x²+1/x²)

hyunxu: how to solve?

vidurbadam: using compound and multiple angles

hyunxu: sry I dunno...class 11??

vidurbadam: yup

hyunxu: I'm class 10

Answers

Answered by sprao534

1

Please see the attachment

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vidurbadam: ty

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