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# Trigonometric Identity Help! watch

1. Hey can I get some help with this .

If: A = 1+sin(x) / cos (x) then prove 1/A = 1-sin(x) / cos (x).

Thanks !
2. (Original post by intex)
Hey can I get some help with this .

If: A = 1+sin(x) / cos (x) then prove 1/A = 1-sin(x) / cos (x).

Thanks !
Taking the reciprocal of both sides

So you need to show

Try multiplying top and bottom by .

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Updated: March 31, 2013
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