I can't figure these two questions out, please enlighten me 1. 1+ cot^2x = csc^x 2. (1+tan^2x)(1-cos^2x) = tan^2x
Follow Math Help Forum on Facebook and Google+
Originally Posted by slesk I can't figure these two questions out, please enlighten me 1. 1+ cot^2x = csc^x Write them out as sines and cosines. 1+cos^2 x / sin^2 x = 1/sin^2 x Add fractions, (sin^2 x + cos^2 x)/sin^2 x = 1/sin^2 x Which is true because, sin^2 x + cos^2 x = 1 By Pythagorean Identity.
Originally Posted by slesk 2. (1+tan^2x)(1-cos^2x) = tan^2x Here
View Tag Cloud