Write the value of
- 2 \cos {}^{2} c" alt="1 - 2 \cos {}^{2} c" align="absmiddle" class="latex-formula">
1 answer:
Step-by-step explanation:
1-2cos²c.
> (cos²c+sin²c)-2cos²c. (cos²c+sin²c=1)
> cos²c+sin²c-2cos²c
> sin²c-cos²c.
is your correct answer.
hope this helps you.
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