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Can anyone on /sci/ help me PLEASE with this problem on the top.

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Can anyone on /sci/ help me PLEASE with this problem on the top. I have no idea how to do this and I really need help. Please help anons!!!
>>
Bump, please help!!!
>>
Are they two separate questions?

For sin(x-y) use the double angle formula.
sin(x-y) - sin(x)cos(y) - cos(x)sin(y)
>>
>>8508963
oops, I meant
sin(x-y) = sin(x)cos(y) - cos(x)sin(y)
>>
Reminder: /sci/ is for discussing topics pertaining to science and mathematics, not for helping you with your homework or helping you figure out your career path.

If you want advice regarding college/university or your career path, go to /adv/ - Advice.

If you want help with your homework, go to /wsr/ - Worksafe Requests.
>>
>>8508963
Sum and difference formula*
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