Math, asked by kiransarma9392, 22 hours ago

cos(n+1)aĺpha.cos(n-1)alpha+sin(n-1)alpha.sin(n-1)alpha

Answers

Answered by oOItzStylishQueenOo

6

Answer:

cos{2 alpha}

hope it helps you

Answered by IIStylishKingII

10

Answer:

cos{2 alpha }

hope it helps you..

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