Question

sendo x =π/2 calcule A sabendo que A=SEN3X+COS4X-Tg 2x

Answer 1

A = sen 3(π/2) + cos 4(π/2) – tg2(π/2) 

A = sen 3π/2 + cos 2π – tg π 

A = -1 + 1 – sen π/cos π 

A = – 0/(-1)=0