1.

What is the value of \(\frac{{tan9^\circ 23^\circ tan60^\circ tan67^\circ tan81^\circ }}{{cos{e^2}72^\circ + {{\cos }^2}15^\circ - {{\tan }^2}18^\circ + {{\cos }^2}75^\circ }} \)

A. \(\frac{1}{2 \sqrt 3}\)
B. \(\frac{\sqrt 3}{2}\)
C. \(\frac{1}{\sqrt3}\)
D. 2√3
Answer» C. \(\frac{1}{\sqrt3}\)


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