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ICSE Class 10 Answered

SinA+sinB/cosA-cosB+cosA+cosB/sinA-sinB=?  
Asked by ak7658270 | 30 Jul, 2019, 09:30: PM
answered-by-expert Expert Answer
begin mathsize 16px style fraction numerator sinA plus sinB over denominator cosA minus cosB end fraction plus fraction numerator cosA plus cosB over denominator sinA minus sinB end fraction end style
begin mathsize 16px style equals fraction numerator sin squared straight A minus sin squared straight B plus cos squared straight A minus cos squared straight B over denominator left parenthesis cosA minus cosB right parenthesis left parenthesis sinA minus sinB right parenthesis end fraction end style
begin mathsize 16px style equals fraction numerator sin squared straight A plus cos squared straight A minus left parenthesis sin squared straight B plus cos squared straight B right parenthesis over denominator left parenthesis cosA minus cosB right parenthesis left parenthesis sinA minus sinB right parenthesis end fraction end style
= 0
Answered by Renu Varma | 31 Jul, 2019, 10:29: AM

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