SSC CGL 26 Oct 2014 Shift 1 Paper

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Question : 129 of 200

Marks: +1, -0

The expression 1 +

{cot^2 A}/{1+cosecA}

is equal to

cosec A
sin A
cos A
tan A

Solution:

1 +

{cot^2 A}/{1+cosecA}

= 1 +

{cosec^2 A -1}/{1+cosecA}

= 1 +

{(cosecA - 1)(cosecA1)}/{1+cosecA}

= 1 + cosec A - 1 = cosec A

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