If secA= x+1/4x, prove that secA+tanA=2x or  1/2x.

Ans:    Sec? = x +  1/4x

⇒ Sec²? =( x + 1/4x)²                             (Sec²?= 1 + Tan²?)

Tan²? = ( x + 1/4x)²-1

Tan²? = ( x - 1/4x)²

Tan? = + x - 1/4x

Sec? + Tan? = x + 1/4x + x-1/4x

=2x or 1/2x

Posted Date: 4/9/2013 1:23:44 AM | Location : United States

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