Considering only the values of β for which csc² βcos (2β) is defined, which of the following expressions is equivalent to csc²

Question

Considering only the values of β for which csc² βcos (2β) is defined, which of the following expressions is equivalent to csc² βcos (2β)?

Select the correct answer below:

2 
2 - sec² β  
2sin²β - tan² β
2sin β 
cot²β - 1

Kunduz · Accepted Answer

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