(c) Given that, $\sin{\theta + cosec\ \theta = 2}$ On squaring both sides, we get $\sin^{2}{\theta + {cosec}^{2}\theta + 2 = 4}$ $\Rightarrow \sin^{2}{\theta + {cosec}^{2}\theta = 2}$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.