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Sines And Cosines Are Better

Geometry Level 2

\[ \large \dfrac { \tan^2 \theta - 1 }{ \tan^2 \theta + 1 } = \, ? \]

Check out the set: 2016 Problems

\[ \cos ^{ 2 }{ \theta } \] \[-1\] \[ \sin ^{ 2 }{ \theta } \] \[ 1 - 2\cos ^{ 2 }{ \theta } \]

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Excel in math and science

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It's hard to learn from lectures and videos

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by Angela Fajardo

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