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If sqrt(2)cos A=cos B+cos^3B ,a n dsqrt(...

If `sqrt(2)cos A=cos B+cos^3B ,a n dsqrt(2)sinA=sinB-sin^3Bt h e nsin(A-B)=` `+-1` (b) `+-1/2` (c) `+-1/3` (d) `+-1/4`

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
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