Math, asked by ashutoshf6826, 1 year ago

sin4A/sinA=8cos^3A-4cosA

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Answered by akash112

4

hi here is your answer

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Answered by kareemunnisabegum984

4

write sin4A as sin(3A+A)

and expand it

then in place of sin3A and cos3A use the formula as obove

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