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Sin7x - 10cosx = sinx +cos2x
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4 votes
Sin7x - 10cosx = sinx +cos2x

User Jjn
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1 Answer

5 votes

Answer:

sin7x - sinx = cos2x - 10cosx

= sin6x = 10cosx

Explanation:

hope that will help you

User Arilwan
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