很高兴为你解答有用请采纳
如图
3/8x-1/4sin2x+1/32sin4x+c
解:因为sin^4t=(sin^2t)^2=((1-cos2t)/2)^2=1-cos2t+1/4cos^22t=1-cos2t+1/8(1+cos4t)=9/8-cos2t+1/8cos4t所以:∫sint ^4dt=∫(9/8-cos2t+1/8cos4t)dt=9/8t-1/2sin2t+1/32sin4t+C希望对你有所帮助 还望采纳~~