[tex] \sin( \alpha ) = \frac{a}{c} [/tex]

[tex] \cos( \alpha ) = \frac{b}{c} [/tex]

[tex] \sin( \beta ) = \frac{b}{c} [/tex]

[tex] \cos( \beta ) = \frac{a}{c} [/tex]

[tex] \tan( \alpha ) = \frac{a}{b} [/tex]

[tex] \tan( \beta ) = \frac{ b }{a} [/tex]