A) \[\sin 2x[\tan x+\cot x]=2\]
B) \[1-cos2x=2co{{s}^{2}}x\]
C) \[ta{{n}^{2}}x+{{\cot }^{2}}x={{\sec }^{2}}x+{{\operatorname{cosec}}^{2}}x\]
D) \[{{\cot }^{2}}x-{{\tan }^{2}}x=1\]
Correct Answer: A
Solution :
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