Question

define periodic function find the period of f(x)=cos(4x+9/5)​

Answer 1

Hope it helps you

we know, period of cosx is 2π

then, period of cos(4x) = 2π/|4| = π/2. and also period of cos(4x + 9/5) = π/2. hence, period of cos(4x + 9/5) = π/2.