Math, asked by devkaushik71, 1 year ago

find the general value of cosa-cos2a=sin3a

Answers

Answered by ravisanplapcjwiv

I hope you will be able to understand

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devkaushik71: thank you bro but ye btao ki apne sin3a ka kya kiya ye konsa formula lagaya apne

ravisanplapcjwiv: use sin 2a formula

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devkaushik71: ok but vha toh sin 3ah

ravisanplapcjwiv: sin 3a h

ravisanplapcjwiv: sin 3a = 2 sin 3a/2 cos 3a/2

Answered by rijalsanskar

Answer:

Step-by-step explanation:

Cosa-cos2a-sin3a=0

2sin3a/2.sina/2-2sin3a/2.cos3a/2=0

Sin3a/2(sina/2-cos3a/2)

Either sin3a=0. Or sina/2-cos3a/2=0

Sin3a=0. Or Cos 3a/2=cos(180/2-a/2)

a=(n×180)/3. Or3a/2=2n*180plusminus(180\2-a)

a=(n*180)/3 Or a=(4n*180 plusminus a=(n*180)/3

Plus minus=+-

There was no pie in keyboard pie=180

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