( cosec A - sin A )( sec A - cos A )= 1/tanA + cotA

Asked by  | 13th Aug, 2012, 01:13: PM

Expert Answer:


=(cosecAsecA-cosecAcosA-sinAsecA+sinAcosA) by multiplying the binomials.

(sinA/cosA)+sinAcosA by rewriting in terms of sine and cosine

--------------------------------------     … getting a common denominator.

=sinAcosA          ...by simplifying



=1/[sinA/cosA +cosA/sinA]


Answered by  | 13th Aug, 2012, 02:35: PM

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