Home
Class 12
MATHS
cosA+cos((4pi)/3-A)+cos((4pi) /3+A)=0...

`cosA+cos((4pi)/3-A)+cos((4pi) /3+A)`=0

Promotional Banner

Similar Questions

Explore conceptually related problems

Prove that: cos(pi/7)cos((2pi)/7)cos((4pi)/7)=-1/8

If a=b cos((2pi)/3)= c cos((4pi)/3), then write the value of a b+b c+c a

3.Prove that (i) "cos((2pi)/7)*cos((4pi)/7)*cos((8pi)/7)=1/8

cos(pi/11) cos((2pi)/11) cos((3pi)/11)....cos((11pi)/11)=

"cos(pi/15)cos((2pi)/15)cos((4pi)/15)cos((8pi)/15)=k

cos(pi/65)cos((2pi)/65)cos((4pi)/65)cos((8pi)/65)cos((16pi)/65)cos((32pi)/64)=1/64

Show that cos(pi/65)cos((2pi)/65)cos((4pi)/65)cos((8pi)/65)cos((16pi)/65)cos((32pi)/65)=1/64

Prove that: cos((3pi)/(4)+A)-cos((3pi)/(4)-A)=-sqrt(2)sinA

Prove that: cos(pi/5)cos((2pi)/5)cos((4pi)/5)cos((8pi)/5)=(-1)/16

Prove that cos ((2pi)/7)+ cos ((4pi)/7) + cos ((6pi)/7) = - 1/2