v) sin^2x=1-cosx

vi)sin^2x=1

vii)1-cos^2x=2sin x

viii) sin^2 x=2cos^2 x

ix) 2sin^2 x=3cos x

x) 3tan^2x-10tan x +3=0

thanks in advance really stuck !

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- Jan 30th 2011, 01:05 PMmoesizlakSolve the following equations for 0<x<360 ?
v) sin^2x=1-cosx

vi)sin^2x=1

vii)1-cos^2x=2sin x

viii) sin^2 x=2cos^2 x

ix) 2sin^2 x=3cos x

x) 3tan^2x-10tan x +3=0

thanks in advance really stuck ! - Jan 30th 2011, 01:19 PMchisigma
v) $\displaystyle \sin^{2} x = 1-\cos x \implies 1-\cos^{2} x = 1-cos x \implies 1+\cos x = 1 \implies \cos x =0$...

Kind regards

$\displaystyle \chi$ $\displaystyle \sigma$ - Jan 30th 2011, 03:19 PMskeeter
- Jan 30th 2011, 04:13 PMProve It
- Jan 31st 2011, 12:33 AMmr fantastic
Please don't post more than two questions in a thread. Otherwise the thread can get convoluted and difficult to follow. See rule #8: http://www.mathhelpforum.com/math-he...ng-151418.html.

Thread closed.