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#1 2007-01-08 03:42:50

Kiran
Member
Registered: 2006-11-15
Posts: 177

following equation

given that 0 degrees <_ x < 360 degrees , solve the following equation :

cos x - sqrt(1 - cos^2 x) = 0


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#2 2007-01-08 04:14:38

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: following equation

A basic identity is that sin² x + cos² x = 1.

Therefore, 1 - cos² x = sin² x, and so sqrt(1 - cos² x) = sin x.

So now you have cos x - sin x = 0. And it should be easy after that.


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It wanted to be normal.

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