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OpenStudy (anonymous):
9 sec2 A - 9tan2A = ?
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OpenStudy (anonymous):
9
OpenStudy (anonymous):
how you got it
OpenStudy (anonymous):
1 + tan^2 = sec^2
OpenStudy (anonymous):
can u pls explain more
OpenStudy (anonymous):
u can get from cos^2 +sin^2 = 1
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OpenStudy (anonymous):
ok thx
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