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If sin alpha + cos alpha = b, then sin 2...

If sin `alpha + cos alpha `= b, then sin 2`alpha` is equal to

A

`b^(2) - 1, if b le sqrt(2)`

B

`b^(2) - 1, if b gt sqrt(2)`

C

`b^(2) - 1, if b ge 1`

D

`b^(2) - 1, if b ge sqrt(2)`

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A, B
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SURA PUBLICATION-TRIGONOMETRY-EXERCISE 3.12
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  13. In a triangle ABC, sin^(2)A + sin^(2)B + sin^(2)C = 2, then the triang...

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