Please help me with 17 and 18. The first best answer gets brainlist.
2 answers:
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Answer: 
I'm assuming you mean this:
Recall what the cosecant function represents. It is the reciprocal of a sine function, and is often written in this form:
So, using the sine relationship:
Let
I'm assuming you mean this:
Recall what the cosecant function represents. It is the reciprocal of a sine function, and is often written in this form:
So, using the sine relationship:
Let