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If sin x + cos x = sqrt2 * c os x, "the...

If `sin x + cos x = sqrt2 * c os x,` `"then : cos x - sin x = ......`A)`sqrt2* cos x` B)`sqrt2* sin x` C)`sqrt2* (cos x +sinx)` D)none of these

A

`sqrt2* cos x`

B

`sqrt2* sin x`

C

`sqrt2* (cos x +sinx)`

D

none of these

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The correct Answer is:
B
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