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Trig Identities (1 Viewer)

Thread starter Shazer2
Start date Apr 7, 2013

Shazer2

Member

#1

Can somebody tell me how I can simplify ${ sin }^{ 2 }\theta -sin^{ 2 }\theta \times cos^{ 2 }\theta$ ?

Thanks.

Last edited: Apr 7, 2013

Carrotsticks

Retired

#2

$\\ \sin ^2 x (1 - \cos ^2 x) = \sin ^2 x \times \sin ^2 x = \sin ^4 x$

Trebla

Administrator

Administrator

#3

$\sin^2\theta - \sin^2\theta\cos^2\theta = \sin^2\theta (1 - \cos^2\theta) = \sin^4\theta$

Shazer2

Member

#4

Thanks heaps

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