Question

(Mack) Se p=π/2 então senp+2cotg(p/2)-cos2p então:

$\frac{senp+2cotg(p/2)-cos2p}{tg(p/2)*cosecp+sec4p}$
então:
a)-2
b)0
c)1/2
d)2
e)4

Answer 1

$\frac{sen{p}+2\cot{p/2}-\cos{2p}}{\tan{p/2}.\csc{p}+\sec{4p}} \\ \frac{sen \pi/2+2\cot{\pi/4}-\cos \pi}{\tan\pi/4.\csc\pi/2+\sec2\pi}= \frac{1+2.1-(-1)}{1.1+1}=2$