Question

Determine o valor de sen(11π)/6 + cos(5π)/3 + lg(5π)/4

Answer 1

sen 11π/6 = - sen π/6 = sen 30° = -1/2

cos 5π/3 = cos π/3 = cos 60° = 1/2

tg 5π/4 = tg π/4 = tg 45° = 1

Somando os valores:

-1/2 + 1/2 + 1 = 1