English, asked by AryanSanger, 8 months ago

Cos 3x+Cos 5x+Cos 7x+Cos 9x
Q20. Prove that:
= Cot 6x
Sin 3x+Sin 5x+Sin 7x+Sin 9x

Answers

Answered by aaysha14

3

Answer:

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Answered by raihokonti

1

Answer:

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