I need help with this one...

sin^{3}A+cos^{3}A/sinA + CosA = 1-sinAcosA

Thanks

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- Nov 10th 2012, 02:09 PMWhatthePatelTrig identity? (new one)I need help with this one...

sin^{3}A+cos^{3}A/sinA + CosA = 1-sinAcosA

Thanks

- Nov 10th 2012, 02:24 PMPlatoRe: Trig identity?
- Nov 10th 2012, 03:19 PMWhatthePatelRe: Trig identity?
New identity?

sin3x = 3cos^{2}xsinx-sin^{3}x - Nov 10th 2012, 03:26 PMskeeterRe: Trig identity?
$\displaystyle \sin(3x) = \sin(2x+x) = \sin(2x)\cos(x) + \cos(2x)\sin(x)$

finish it using appropriate double angle identities.

... and, start a new thread for a new problem.