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Prove that cos 6x = 32 cos ^(6) x - 48 c...

Prove that `cos 6x = 32 cos ^(6) x - 48 cos ^(4) x + 18 cos ^(2) x -1.`

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ICSE-COMPOUND AND MULTIPLE ANGLES -CHEPTER TEST
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  13. If tan "" (alpha )/(2) and tan "" (beta)/( 2) are the roots of the eq...

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  17. Prove that cos 6x = 32 cos ^(6) x - 48 cos ^(4) x + 18 cos ^(2) x -1.

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