Find the value of \(\tan 15^\circ \times \tan 30^\circ \times \tan 45^\circ \times \tan 60^\circ \times \tan 75^\circ\).
A. 1
B. \(\sqrt{3}\)
C. \(\frac{1}{\sqrt{3}}\)
D. 0
A. 1
B. \(\sqrt{3}\)
C. \(\frac{1}{\sqrt{3}}\)
D. 0
Best answer
Answer: A. 1
Answer: (A) 1
\(\tan\theta \times \tan(90^\circ - \theta) = \tan\theta \times \cot\theta = 1\). So \(\tan 15^\circ \tan 75^\circ = 1\), \(\tan 30^\circ \tan 60^\circ = 1\) and \(\tan 45^\circ = 1\). Product \(= 1\).
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