What is the exact value of sin (-π/12)
sin (-pi/12) = sin (-15°) = -sin (15°) = - sin (45° - sin 30°) =
- [ sin 45° cos 30° - sin 30° cos 45° ] =
- [ √2/2 * √3/2 - 1/2 * √2/2] =
- [ √6 - √2] / 4 =
√2 - √6
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