Verify the Identity $\frac { \sin \theta + \sin 9 \theta } { \cos \theta + \cos 9 \theta } = \tan 9 \theta$

question 14

Multiple Choice

Verify the identity. $\frac { \sin \theta + \sin 9 \theta } { \cos \theta + \cos 9 \theta } = \tan 9 \theta$

• A) Not identical
• B) Identical

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