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September 30, 2014

September 30, 2014

Posted by **berhana** on Monday, November 6, 2006 at 10:23pm.

sec(-x)/csc(-x)=tan(x)

thanx to anyone who can help

From the definition of the sec and csc functions, and the tan function,

sec(-x)/csc(-x) = sin(-x)/cos(-x)

= tan(-x)

However, tan (x) does not equal tan (-x). They have opposite signs

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