5.4 Integration of products of powers of trigonometric/hyperbolic functions (1) Evaluate the following integrals. (a*) / sin' rcos rda (b) / sech x tanhidr x/3 (c) Jo cos(11x) cos(5x) da (d) secr tan* r dr Jo (e*) ( sech' r tanh' rdr (f) sin(3x) sin(8x) dr (g*) / tanhr(sechr)3/2 dr (h) cosh(2x) sinh(7r) dr 1 /2 () Vsin- xcos' x dr sin* r cos r dr .In 2 (* * * ) / cosh- r sinh rdr (1) cosh? rsinh' r dr