Thread: more trig
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Old December 14th, 2008, 10:11 AM
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Originally Posted by william View Post
1. show that cos150/sin150=1/tan150

2. prove tan O cos O = sin O
2.
Prove that tan\vartheta cos\vartheta = sin \vartheta

=tan\vartheta cos\vartheta = sin \vartheta

=(sin\vartheta/cos\vartheta)cos\vartheta

=sin \vartheta
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