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March 25, 2017

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Find the exact value of sin75degrees+ sin15degrees.

  • Trig - ,

    One way, if you've learned some trig properties... sin x + sin y = 2*sin((x+y)/2)*cos((x-y)/2)

    So sin(75) + sin(75) = 2*sin(45)*cos(30) = 2*sqrt(2)/2*sqrt(3)/2 = sqrt(6)/2

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