Question #abce1

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Question #abce1

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Answer 1 · 2016-09-01T01:08:45

$sin (- \frac{3}{4} π) = - sin (\frac{3}{4} π) = - sin (π - \frac{π}{4}) = - sin (\frac{π}{4}) = - \frac{1}{\sqrt{2}}$ $sin(-3/4pi)=-sin(3/4pi)=-sin(pi-pi/4)=-sin (pi/4)=-1/sqrt 2$ .-

Explanation:

$π$ $pi$ radian $= 180^{o}$ $= 180^o$

Here, the conversion factor is $\frac{π}{180} .$ $pi/180.$ .

So, $- 135^{o} = - \frac{135}{180} π = - \frac{3}{4} π$ $-135^o=-135/180pi=-3/4pi$ radian.

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