Question

高数解题的？

这题怎么写 要过程解答

Answer 1

∫2sin2x/[2(sinx)^2 +(cosx)^2] dx
=∫2sin2x/[ 1-cos2x +(1/2)(1+cos2x)] dx
=∫2sin2x/[ 1-cos2x +(1/2)(1+cos2x)] dx
=4∫sin2x/( 3-cos2x ) dx
=2∫d(3-cos2x)/( 3-cos2x )
=2ln|3-cos2x| +C