1 . x=e-2t , y=2cos3t

• A. $-2\hat{i} + 4\hat{k}$
• B. $-2\hat{i}-6\hat{j} + 4\hat{k}$
• C. $-\hat{i}+2\hat{j}$
• D. $2\hat{i}+6\hat{j} + 4\hat{k}$

Answer: Option A

Explanation: