Identify the cofunction equivalent to cos⁡2π11\cos\frac{2\pi}{11}.

Cofunctions of Complementary Angles

2. Trigonometric Functions on Right Triangles / Cofunctions of Complementary Angles / 문제 2

문제 2

Identify the cofunction equivalent to $\cos \frac{2 π}{11}$ .

$\csc \frac{9 π}{11}$

$\sin \frac{9 π}{11}$

$\sec \frac{7 π}{22}$

$\sin \frac{7 π}{22}$