Question 90

What is the value of sec -2π/3 ?

Expression : sec -2π/3

$$\because sec(-x) = sec(x)$$

=> $$sec(\frac{-2\pi}{3}) = sec(\frac{2\pi}{3})$$

= $$sec(\pi-\frac{\pi}{3}) = -sec(\frac{\pi}{3})$$

= $$-2$$

=> Ans - (A)

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