Question

É MUITO URGENTE, PFVR!!!!!!!!!!

Calcule o valor da expressão:
tg 7π/4 + 2∙sen 3π/2
----------------------------
3∙cos 2π

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\mathsf{\dfrac{tg\:\dfrac{7\pi }{4} + 2\:sen\dfrac{3\pi }{2}}{3\:cos\:2\pi }}$

$\mathsf{\dfrac{tg\:\dfrac{1.260\textdegree }{4} + 2\:sen\dfrac{540\textdegree }{2}}{3\:cos\:360\textdegree }}$

$\mathsf{\dfrac{tg\:315\textdegree + 2\:sen\:270\textdegree}{3\:cos\:360\textdegree}}$

$\mathsf{\dfrac{(-1) + 2(-1)}{3\:(1)}}$

$\mathsf{-\dfrac{3}{3}}$

$\boxed{\boxed{\mathsf{\dfrac{tg\:\dfrac{7\pi }{4} + 2\:sen\dfrac{3\pi }{2}}{3\:cos\:2\pi } = -1}}}$