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CBSE Class 12-science Answered

Integration e-x cos 2x cos 4x dx  explain in great detail and give full slotion  
Asked by haroonrashidgkp | 20 Oct, 2018, 11:03: PM
answered-by-expert Expert Answer
begin mathsize 16px style straight I equals integral straight e to the power of negative straight x end exponent cos 2 xcos 4 xdx
straight I equals 1 half integral straight e to the power of negative straight x end exponent left parenthesis 2 cos 2 xcos 4 straight x right parenthesis dx
straight I equals 1 half integral straight e to the power of negative straight x end exponent open parentheses cos 6 straight x plus cos 2 straight x close parentheses dx
straight I equals 1 half integral open parentheses straight e to the power of negative straight x end exponent cos 6 straight x plus straight e to the power of negative straight x end exponent cos 4 straight x close parentheses dx
Further space integrate space it space by space parts. end style
Answered by Sneha shidid | 22 Oct, 2018, 04:30: PM
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