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Complete Basic Trigonometry Proofs Practice Test
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Q1
Using trigonometric identities determine whether the following is valid:
$\tan2A = \frac{2\sin\left(-A\right) \cos\left(-A\right)}{\cos^{2}\left(-A\right) + \sin^{2}\left(-A\right)}$
Using trigonometric identities determine whether the following is valid:
$\tan2A = \frac{2\sin\left(-A\right) \cos\left(-A\right)}{\cos^{2}\left(-A\right) + \sin^{2}\left(-A\right)}$