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OpenStudy (please.help.me):
Verify cos^3 x sin^7 x = (sin^7 x − sin^9 x)cos x Screenshot below! Please help!
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OpenStudy (please.help.me):
satellite73 (satellite73):
what they are asking you to do for the first box with the big red X is just to factor out a cosine
satellite73 (satellite73):
or rather i should say factor out \(\cos^2(x)\)
satellite73 (satellite73):
in the NEXT box they want you to put \(1-\sin^2(x)\) because that is what cosine squared is
OpenStudy (please.help.me):
So the first box is cos^2 (x) ?
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OpenStudy (please.help.me):
Is it using the identity sin^2 x + cos^2 x = 1 ?
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