education How do you evaluate sin and cos if tan = ¾ and theta ranging from 0 to 90. TRIGONOMETRY ENGINEERING Posted on May 4, 2021May 4, 2021 by Emperorelectricalworks Emperorelectricalworks Evolving education world wide 🌎 An amplifier when first built has an open loop gain of 120 after a while due to ageingthis falls to 90. Calculate the percentage reduction in gain. How to solve trigonometry equation using case 1, case 2 and case 3 (part 1)