Q. 21
Mark the correct A. 21/22
B. 15/16
C. 44/117
D. 117/43
Answer :
Let cosec x =a, cot x = b
∴ According to the question
But, cosec2x –cot2x =1
⇒ a2 – b2 = 1
⇒ (a-b)(a + b) = 1
a + b =11/2 …(1)
a-b =2/11 …(2)
Adding (1) and (2)
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