Step-by-step explanation:

b. Since csc theta = 1/sin theta, we can multiply both sides by sin theta and you will end up with

which is an identity.
Answer:
I don't see a question. if you comment it on this answer I can try to help
Answer:
3
Step-by-step explanation:
1) when dividing fractions change the sign to multiplication and flip the second fraction(reciprocal) upside down and multiply

12/4=3
hope this helps!