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OpenStudy (anonymous):
Trig Identities Proof: \[\sec^6x-\tan^6x=1+3\tan^2xsec^2x\]
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OpenStudy (anonymous):
I tried using the left hand side and got this so far... (sec^2)^3-(tan^2x)^3
OpenStudy (triciaal):
sec = 1/cos tan = sin/cos sin^2 + cos^2 = 1
OpenStudy (triciaal):
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