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Use an Identity to Write the Expression as a Single $\sqrt { \frac { 1 - \cos 20 ^ { \circ } } { 2 } }$

Question 298

Multiple Choice

Use an identity to write the expression as a single trigonometric function or as a single number.
- $\sqrt { \frac { 1 - \cos 20 ^ { \circ } } { 2 } }$

A) $\cos 10 ^ { \circ }$
B) $\cot 10 ^ { \circ }$
C) $\tan 10 ^ { \circ }$
D) $\sin 10 ^ { \circ }$

Use an Identity to Write the Expression as a Single 1−cos⁡20∘2\sqrt { \frac { 1 - \cos 20 ^ { \circ } } { 2 } }21−cos20∘​​

Multiple Choice

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Use an Identity to Write the Expression as a Single $\sqrt { \frac { 1 - \cos 20 ^ { \circ } } { 2 } }$

Correct Answer:
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