cos(3x+Pie)=Radical 2/2 Sorry i dont know how to do the signs... Thank you.
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Originally Posted by ep78 cos(3x+Pie)=Radical 2/2 Sorry i dont know how to do the signs... Thank you. from the unit circle (with which you should be familiar) ... $\displaystyle \cos\left(\frac{\pi}{4}\right) = \cos\left(\frac{5\pi}{4}\right) = \frac{\sqrt{2}}{2}$ so ... $\displaystyle 3x + \pi =$ ?
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