Ask Me Help Desk - Establish the identity

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establish the identity

can someone please show me how to establish this identity?
1+sin(a)+cos(a) / 1+sin(a)-cos(a) = 1+cos(a) / sin(a)

Group some terms and 'rationalise'

$\frac{(1+sinA) + cosA}{(1-sinA) - cosA} = \frac{(1+sinA) + cosA}{(1+sinA) - cosA} \times \frac{(1+sinA) + cosA}{(1+sinA) + cosA}$

Take do this and simplify. You should be getting close to the solution easily enough. Post what you get! :)

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