Is this cofunction identity correct? $$\text{cos}{(\frac{11\pi}{6})} = \text{sin}{(\frac{\pi}{2} - \frac{11\pi}{6})}$$

Trigonometry Identities - Co-Function Identity True/False (Radians)

Level 1

The topics in this unit focus on mastering the basic trigonometric identities. Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Trigonometry Identities - Co-Function Identity True/False (Radians)

Is this cofunction identity correct?

\text{cos}{(\frac{7\pi}{6})} = \text{sec}{(\frac{\pi}{2} - \frac{7\pi}{6})}

Earned ?