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ylucho
 2 years ago
please help with verifying :
sin^2x/22cosx=cos^2 x/2
ylucho
 2 years ago
please help with verifying : sin^2x/22cosx=cos^2 x/2

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surjithayer
 2 years ago
Best ResponseYou've already chosen the best response.0\[\frac{ \sin ^{2}x }{ 22\cos x }=\frac{ 1 }{ 2 }*\frac{\sin ^{2}x }{1\cos x }*\frac{1+\cos x }{1+\cos x }\] \[=\frac{ 1 }{ 2 }*\frac{ \sin ^{2}x \left( 1+\cos x \right) }{ 1\cos ^{2}x }\] you can solve and use \[1\cos ^{2}x=\sin ^{2}x and 1+\cos x=2\cos ^{2}\frac{ x }{ 2 }\]

ylucho
 2 years ago
Best ResponseYou've already chosen the best response.0thanks for the help!!! I never thought about splitting at the beginning into two fractions :P thanks!
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