Topic: Mathematics
$(cos~5\theta-i~sin~5\theta)^{2}$ is same as
- A. $cos~10\theta+sin~10\theta$
- B. $cos~25\theta-i~sin~25\theta$
- C. $(cos\theta+i~sin~\theta)^{-10}$
- D. $(cos~\theta-i~sin~\theta)^{-10}$
Answer: C. $(cos\theta+i~sin~\theta)^{-10}$
Explanation: Detailed explanation not provided in the source.