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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`

A

`(1)/(2)`

B

`(1)/(3)`

C

`-(1)/(2)`

D

`-(1)/(3)`

Text Solution

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The correct Answer is:
B, D
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