Question 1100865: Verify the following identity. Which of the following three statements verifies the given equation?
https://www.dropbox.com/s/126rx0pjvngue6h/Screen%20Shot%202017-11-08%20at%208.34.39%20PM.png?dl=0
Answer by greenestamps(13214)   (Show Source):
You can put this solution on YOUR website!
This could have been quite a good exercise in proving identities if you had simply been asked to do the proof.
But since they give you three choices of how to complete the proof, all you need to do is look at each one and see which one is valid.
In the third answer choice, the identity for sin(theta/2) is incorrect; so that is not the right answer.
For the other two answer choices, multiplying 1 times csc(theta) (first answer choice) results in csc(theta), multiplying 1 times sec(theta) (second answer choice) does not.
So the correct path for proving the identity is the first answer choice.
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