Find the value of $sin 1 5^{o}$ .

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Find the value of

sin 1 5^{o}

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Text solutionVerified

We've,

sin 1 5^{o}

= sin (4 5^{o} - 3 0^{o})

= sin 4 5^{o} . cos 3 0^{o} - sin 3 0^{o} . cos 4 5^{o}

= \frac{1}{2} . \frac{3}{2} - \frac{1}{2} . \frac{1}{2}

= \frac{3 - 1}{2 2}

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