For the following exercises, algebraically determine whether each of the given expressions

For the following exercises, algebraically determine whether each of the given expressions is a true identity. If it is not an identity, replace the right-hand side with an expression equivalent to the left side. Verify the results by graphing both expressions on a calculator.

cos(10θ) + cos(6θ)/cos(6θ) − cos(10θ) = cot(2θ)cot(8θ)