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CBSE Class 10 Answered

QUESTION
Asked by sonaisha | 24 Nov, 2008, 08:59: PM
answered-by-expert Expert Answer

NUMERATOR = cos A cosecA -sinA secA

=cosA/ sin A  - sinA / cos A

=(cos2A- sin2A ) / (cos A sinA ) = (cosA+sinA)(cosA-sinA) / (cos A sinA )

NUM / DEN = (cos A - sinA ) / (cos A sinA ) = cosecA - secA

Answered by | 28 Nov, 2008, 02:30: PM

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