\( \theta=\frac{3\pi}{5} \) वाले कोण की संदर्भ कोण क्या है?
What is the reference angle of an angle \( \theta=\frac{3\pi}{5} \)?
Explanation opens after your attempt
B. \( \frac{2\pi}{5} \)
Concept
\( \frac{3\pi}{5} \) lies in the second quadrant, and the reference angle is \( \pi-\frac{3\pi}{5}=\frac{2\pi}{5} \). In the second quadrant use \( \pi-\theta \).
Why this answer is correct
The correct answer is B. \( \frac{2\pi}{5} \). \( \frac{3\pi}{5} \) lies in the second quadrant, and the reference angle is \( \pi-\frac{3\pi}{5}=\frac{2\pi}{5} \). In the second quadrant use \( \pi-\theta \).
Exam Tip
\( \frac{3\pi}{5} \) द्वितीय चतुर्थांश में है और संदर्भ कोण \( \pi-\frac{3\pi}{5}=\frac{2\pi}{5} \) है। द्वितीय चतुर्थांश में \( \pi-\theta \) लें।
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