Question

Dada a função f(x)=-2.sen x.cos x/2 // sex 3.x, determine a f(pi/2)

Answer 1

Dada a função f(x)=-2.sen(x).cos(x/2)/ sen(3x)

determine a f(pi/2)

sen(pi/2) = sen(90) = 1

cos(pi/4) = √2/2

sen(3pi/2) = -1

f(pi/2) = (-2*1*√2/2)/-1 = √2