Is this half-angle identity correct? $$\text{sin}{(\frac{\beta}{2})} = \pm\sqrt{\frac{1+\text{cos}(\beta)}{2}}$$

Trigonometry Identities - Half Angle Identity True/False (Greek Letter)

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 - Half Angle Identity True/False (Greek Letter)

Is this half-angle identity correct?

\text{tan}{(\frac{\beta}{2})} = \pm\sqrt{\frac{1-\text{cos}(\beta)}{1+\text{cos}(\beta)}}

Earned ?