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OpenStudy (anonymous):
Proving Identities: 2tanx/(1-tan^2x)+1/(2cos^2x-1) = cosx+sinx/(cosx-sinx) ? how ?
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OpenStudy (dan815):
ugh its just manipulation u can doo it gogo
OpenStudy (anonymous):
ok sir.i'll try to solve it again.
OpenStudy (dan815):
i dont think u even need to use this but.. if u get stuck http://www.maths.manchester.ac.uk/~cds/internal/tables/trig.pdf
OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
really can't solve it
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