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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v) ... Kind regards
Originally Posted by moesizlak v) sin^2x=1-cosx 1 - cos^2x = 1 - cosx cosx - cos^2x = 0 cosx(1 - cosx) = 0 cosx = 0 , cosx = 1 x = 90 , 270 ... x = 0 , 360 same idea with the rest. show us something.
Originally Posted by chisigma v) ... Kind regards Though shalt not divide by 0...
Originally Posted by moesizlak 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 ! 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.
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