1.tan(π4+12cos−1x)+tan(π4−12cos−1x)\tan\left(\dfrac{\pi}{4} + \dfrac{1}{2}\cos^{-1} x\right) + \tan\left(\dfrac{\pi}{4} - \dfrac{1}{2}\cos^{-1} x\right)tan(4π+21cos−1x)+tan(4π−21cos−1x), x≠0x \neq 0x=0, is equal toa.xxxb.2x2x2xc.2x\dfrac{2}{x}x2d.π4\dfrac{\pi}{4}4πLogin to continueOnly logged in users canattempt or see the solution.
