Answer:
a. csc²θ
Step-by-step explanation:
You can use the identities ...
1 +tan² = sec²
cot = cos/sin
sec = 1/cos
csc = 1/sin
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Then the expression becomes ...

The correct answer is A. Longing I know because I just finished the quiz.
Answer:
b. 10
Step-by-step explanation: