Factor the trigonometric expression.100 csc4y - 20 csc2 y + 1
A. (10 csc2 y - 1)(10 csc2 y + 1)
B. (10 csc2 y - 1)2
C. (10 - csc2 y)(10 + csc2 y)
D. (10 - csc2 y)2
Answer: B
Mathematics
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