If cos(A) + cos(B) + cos(C) = 0, prove that
cos(3A) + cos(3B) + cos(3C) = 12 cos(A) cos(B)cos(C)
The number of solutions of
1
2
infinite
no solution
D.
no solution
Given
Hence, no solution exist.
If are the roots of the equation ax2 - bx + c = 0, then a, b and c satisfy the relation
a2 + b2 + 2ac = 0
a2 - b2 + 2ac = 0
a2 + c2 + 2ab = 0
a2 - b2 - 2ac = 0