If 0 - - - - - -4- cos - - - - 35 and cos - - - - 45 then sin2- is equal to

The correct option is A 1 cos (α + β) = 35⇒sin (α + β) = 45 cos (α β) = 45⇒sin (α β) = 35 sin (α + β) + sin (α β)cos (α + β) + cos (α ...

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If $0 < β < α < \frac{π}{4}, cos (α + β) = \frac{3}{5}$ and $cos (α - β) = \frac{4}{5}$ then $sin 2 α$ is equal to

1

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cos (α + β) = \frac{3}{5}, sin (α - β) = \frac{5}{13}

0 < α, β < \frac{π}{4},

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0 < α, β < \frac{π}{4}, cos (α + β) = \frac{4}{5}, sin (α - β) = \frac{5}{13}

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cos (α + β) = \frac{4}{5}, sin (α - β) = \frac{5}{13}

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\frac{π}{4}

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