Q.
If ∫cosxcos2xcos5xdx=A1sin2x+A2sin4x+A3sin6x+A4sin8x+Cthen
see full answer
High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET
🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya
a
A1=12,A2=14
b
A1=14,A2=18
c
A2=116,A3=18
d
A1=18, A4=132
answer is D.
(Unlock A.I Detailed Solution for FREE)
Detailed Solution
(cosxcos2x)cos5x=12(cosx+cos3x)cos5x=14[cos4x+cos6x]+14[cos2x+cos8x]=14cos2x+14cos4x+14cos6x+14cos8x∫cosxcos2xcos5xdx=18sin2x+116sin4x+124sin6x+132sinx+C
Watch 3-min video & get full concept clarity