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OpenStudy (anonymous):
help! verify the identity: (sec(theta) + tan(theta)) (1 - sin(theta)) = cos(theta)
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OpenStudy (marcelie):
you can distribute
OpenStudy (unklerhaukus):
LHS = (sec + tan) (1 - sin) = (1/cos + sin/cos)(1-sin) = 1/cos + sin/cos - sin/cos - sin^2/cos = =
OpenStudy (unklerhaukus):
simplify, and then use sin^2+cos^2 = 1
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