# Math Help - equate two cosine functions

1. ## equate two cosine functions

how to solve cos((pi*t)/tau)=cos((pi*t)/(beta*tau))..beta and tau are constant..solve t in term of beta and tau..thank you

2. cos[(πt)/τ] = cos[πt/βτ]

The general solution of the above equation is

[(πt)/τ] = 2nπ + [πt/βτ] οr

[(πt)/τ] = 2nπ - [πt/βτ]

Simplify the equations and find the value of t.