Integrals of Trig Functions
web.ma.utexas.edu › users › m408sx + C. ∫ cos. . x d x = sin. . x + C. In the video, we work out the antiderivatives of the four remaining trig functions . Depending upon your instructor, you may be expected to memorize these antiderivatives. The antiderivatives of tangent and cotangent are easy to compute, but not so much secant and cosecant.