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OpenStudy (anonymous):
how do you lower the power cos^4x
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OpenStudy (anonymous):
think of it as cox^2x * cos ^2x
OpenStudy (anonymous):
I am stuck still..
OpenStudy (anonymous):
then you can use power reducing formula cos ^2x = (1+cos2x)/2
OpenStudy (anonymous):
do i foil those together then?
OpenStudy (anonymous):
now i am stuck sorry..
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