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OpenStudy (anonymous):
prove the following trig identities sinxtanx=1-cosx^2/(cosx)
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OpenStudy (anonymous):
tanx= sinx/cosx so, sinx * sinx/ cosx = sin^2x/cosx = 1-cos^2x/cosx (note: sin^2x + cos^2x = 1)
OpenStudy (anonymous):
cool thanks!
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