to enroll in courses, follow best educators, interact with the community and track your progress.
Enroll
1.4k
495 plays

More
This lesson takes up previous Year Questions PYQ on Quadratic equations

## Vineet Loomba is teaching live on Unacademy Plus

(9)
U
DP
cos6theta+6 cos4theta+15 cos 2 theta+10/cos5theta+5 cos 3 theta +10costheta=2 cos theta answer asap
Vishu Goel
2 months ago
1.) (cos6theta+cos 4theta) +(5cos4theta+5cos2theta)+(10cos2theta+10cos 0)÷ (cos5theta+5cos3theta+10cos theta ). 2.) 2cos(6theta+4theta/2) ×cos(6theta-4theta/2) + 5[cos (4theta+2theta/2)×cos (4theta-2theta/2)]+ 10[2cos (2theta+0/2)×cos(2theta+0/2)].÷ (cos5theta+5cos3theta +10costheta) 3.) (2cos 5theta×costheta)+(10cos3theta×costheta)+(20costheta×costheta).÷ (cos5theta+5cos3theta +10costheta). 4.)2costheta[cos5theta+5cos3 theta+10costheta].÷(cos5theta+5cos3theta +10costheta). 5.) 2costheta. proved.....
Vishu Goel
2 months ago
if u find any problem.. comment me on the section..
DP
Devanshi Pathak
2 months ago
thanks a lot
DP
Devanshi Pathak
2 months ago
thanks a lot
Sir apne advance ke question nhi kr baye