If sin θ, cos θ are two roots of the equation 4x * + 5x + k = 0 about X, then K is

If sin θ, cos θ are two roots of the equation 4x * + 5x + k = 0 about X, then K is


Sin θ, cos θ are the two roots of the equation 4x * + 5x + k = 0 about X, which are sin θ + cos θ = - 5 / 4 squared to get sin ^ 2 θ + 2Sin θ cos θ + cos ^ 2 θ = 25 / 161 + 2Sin θ cos θ = 25 / 162sin θ cos θ = 25 / 16-1 = 9 / 16sin θ cos θ = 9 / 32 because sin θ cos θ = K / 4, so K / 4 = 9 / 32K = 9 / 8