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OpenStudy (anonymous):
cos(x) + sin(x)tan(x) = sec(x). Show this is an identity.
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OpenStudy (amistre64):
well; put everything in terms if sin and cos first
OpenStudy (amistre64):
cos + sin(sin) 1 ------- = ---- cos cos
OpenStudy (amistre64):
cos^2 + sin^2 1 ------------- = ----- = sec cos cos
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