Math, asked by aryan1166, 11 months ago

cos2xcosx/2-cos3xcos9x/2=-sin5xsin5x/2

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Answered by siddhant9275

2

Answer:

not of my level but it is hard

Step-by-step explanation:

hard hard hard

Answered by siri43991

8

Answer:

plz mark as brainliest

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