Express cos150° in surd form.
FURTHER MATHEMATICS
WAEC 2017
Express cos150° in surd form.
- A. \(-\sqrt{3}\)
- B. \(-\frac{\sqrt{3}}{2}\)
- C. \(-\frac{1}{2}\)
- D. \(\frac{\sqrt{2}}{2}\)
Correct Answer: B. \(-\frac{\sqrt{3}}{2}\)
Explanation
cos150° = -cos30°
= \(-\frac{\sqrt{3}}{2}\)
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *