∫sinxsinx−cosxdx is equal to
(where C is integration constant)
A
12ln|sinx−cosx|+x2+C
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B
12ln|sinx+cosx|+x+C
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C
12ln|sinx+cosx|+x22+C
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D
12ln|sinx−cosx|−x2+C
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Solution
The correct option is A12ln|sinx−cosx|+x2+C I=∫sinxsinx−cosxdx=12∫2sinxsinx−cosxdx=12∫sinx+cosx+sinx−cosxsinx−cosx=12∫cosx+sinxsinx−cosxdx+12∫dx=12ln|sinx−cosx|+x2+C