(1/sec(x)tan(x))+ sin(x)



and



cot^2(x)+cot^2(x)Tan^2(x)

What are you supposed to do with those?

I do not see an equation.

Taking a guess, the last one can be simplified:

Factor out :



Note what is in the parentheses is an identity, .

So, we have:





But, by using , we can see that the denominator is equal to: