Question

tag x+ cat x =2sin2x

Answer 1

sin x/cos x + cos x/sin x = (sinkv x + coskv x)/sinx.cosx=1/sinx .cosx.Teper sinx.cos x = 1/2.2.sinx.cosx =1/2.sin2x
1/(1/2sin2x) = 2/sin2x