| (i) \[{{\operatorname{cosec}}^{2}}x+{{\sec }^{2}}x={{\operatorname{cosec}}^{2}}x.{{\sec }^{2}}x\] |
| (ii) \[{{\sec }^{2}}x+{{\tan }^{2}}x={{\sec }^{2}}x{{\tan }^{2}}x\] |
| (iii) \[{{\operatorname{cosec}}^{2}}x+{{\tan }^{2}}x={{\cot }^{2}}+{{\sec }^{2}}x\] |
| Which of the following equations are correct? |
A) (i) and (ii)
B) (ii) and (iii)
C) (i) and (iii)
D) (i), (ii) and (iii)
E) None of these
Correct Answer: C
Solution :
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