Question

Determine o valor das expressões:

$\frac{sen\pi + cos2\pi}{sen \frac{\pi}{2} }$

$\frac{cos \frac{\pi}{2} }{cos \frac{\pi}{2} } + \frac{sen \frac{3\pi}{2} }{cos2\pi}$
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Answer 1

Sen pi + cos2pi / sen pi/2 = 0 + 1 / 1 = 1

Cos pi/2 / cos pi/2 + sen3pi/2 / cos2pi = 0/0 + (-1)/1 = -1/1 = -1