A) 2
B) 3
C) 4
D) 5
Correct Answer: B
Solution :
(b): \[2\left( {{\tan }^{2}}A-{{\sec }^{2}}A \right)-5\left( {{\cot }^{2}}A-\cos e{{c}^{2}}A \right)\] \[\Rightarrow \] \[-2-5(-1)=-2+5=3\]You need to login to perform this action.
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