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प्रश्न
Choose the correct alternative:
If sin α + cos α = b, then sin 2α is equal to
विकल्प
b2 − 1, if `"b" ≤ sqrt(2)`
b2 − 1, if `"b" > sqrt(2)`
b2 − 1, if b ≥ 1
b2 − 1, if `"b" ≥ sqrt(2)`
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उत्तर
b2 − 1, if `"b" ≤ sqrt(2)`
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