Can anyone help me to prove that 2 questions??? I hv try it at least one hour

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junior college 1 | H1 Maths
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junior college 1 H1 Maths

Can anyone help me to prove that 2 questions??? I hv try it at least one hour

Date Posted: 5 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

It's just factor formula

Date Posted: 5 years ago

Newzealand

5 years ago

Thanks a lot
May i know how to make cosx+cos5x=2cos2xcos3x??

Jiayang

5 years ago

Factor formula