Posted by Anonymous on Saturday, November 10, 2007 at 9:14am.
Prove:
(tanx)(sinx) / (tanx) + (sinx) = (tanx)  (sinx) / (tanx)(sinx)
What I have so far:
L.S.
= (sinx / cosx) sinx / (sinx / cosx) + sinx
= (sin^2x / cosx) / (sinx + (sinx) (cosx) / cosx)
= (sin^2x / cosx) / (cosx / sinx + sinxcosx)

Mathematics  Trigonometric Identities  Reiny, Saturday, November 10, 2007 at 12:22pm
your equation is not an identity the way you wrote it,
try substituting any angle into the equation, it will not satisfy the equation.
The way you wrote it,
LS reduces to simply 2sinx
use brackets to identify the exact order of operation.
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