Trigonometric functions in math questions...?

[Alexander The Great]

Sorry, but I need some help in my homework.

I am not sure what the instructions mean:

"Use trigonometric identities to transform one side of the equation into the other.

1. tan (theta) cot (theta) = 1
2. csc (theta) tan (theta) = sec (theta)
3. tan (alpha) cos (alpha) = sin (alpha)
4. cot (alpha) sin (alpha) = cos (alpha)"

So, what do these directions mean and how do I solve it.

Thanks for answering


Question 89 dealing with Trigonometric functions in math questions relating to my homework

Questions 20, 24, 34, 56, and 83 have been deleted because they were numbered wrong, Sorry!!