How to log?

Question

Java

here is my code for this function

f = Math.log(1/5)*(1+Math.cos(3* t))/Math.log(1/3)*(1+Math.sin(5*t));

Answer 1

In Java, Math.log calculates the natural logarithm. Accordingly, you need to change the base of the logarithm in order to calculate correctly.
For example, the logarithm to base b would be Math.log(x) / Math.log(b).
With this knowledge, it will not be difficult to rewrite your expression.