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CBSE Class 10 Answered

Hello Pavan I came across this question while doing some extra questions based on this chaper.i cannot solve the following 4 questions. pleasw help me with this.PLS REPLY AS SOON AS POSSIBLE
Asked by | 18 Apr, 2012, 11:48: AM
answered-by-expert Expert Answer
The questions which you posted are not visible. The answer to the second question which was visible is as follows:
 

LHS =

cosec A + cot A - (cosec2A - cot2A ) / cot A- cosec A + 1 (USING IDENTITY)

= cosec A + cot A -( cosec A + cot A) ( cosecA - cot A) /cot A - cosecA+1

= cosec A+ cot A ( 1- cosec A+ cot A) / cot A-cosec A+1

= cosec A+ cot A

 

RHS

1+cos A /sin A

= 1/ sin A+ cos A / sin A

=cosec A + cot A

Hence LHS =RHS

Answered by | 18 Apr, 2012, 12:30: PM

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