Question

n= cos pi/4 + cos pi/3
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1 + cos 2pi

Answer 1

$\frac{cos(\frac{\pi }{4}) + cos(\frac{\pi }{3})}{1 +cos(2\pi )} = \frac{cos(45)+cos(60)}{1 +cos(360)} = \frac{\frac{\sqrt{2} }{2} + \frac{1}{2} }{1 + 1} = \frac{\frac{1 + \sqrt{2} }{2}}{2} = \frac{1 + \sqrt{2} }{4}$