education How To Prove Trigonometry Equation That Has Square Root. PAST QUESTION (√1-cos/√1+cos = cot- cosecx) Posted on May 4, 2021May 4, 2021 by Emperorelectricalworks Emperorelectricalworks Evolving education world wide 🌎 State three (3) advantages and two (2) disadvantages of interconnected power system. An amplifier with an open loop gain (Av) of 100,000 has 3% negative feedbackapplied. Calculate the closed loop gain.