Trigonometric EquationHard
Question
If tan 
and tan 
are the roots of the equation 8x2 - 26x + 15 = 0 then cos (α + β) is equal to-
and tan are the roots of the equation 8x2 - 26x + 15 = 0 then cos (α + β) is equal to-Options
A.-
B.
C.
D.-1
Solution
tan
tan 
tan
tan 
tan
=
cos (α + β) =
=
tan tan
tan tan
=cos (α + β) =
=
Create a free account to view solution
View Solution FreeMore Trigonometric Equation Questions
The angle between the lines whose direction consines satisfy the equations l + m + n = 0 and l2 = m2 + n2 is...A curve passes through (2, 0) and the slope of tangent at a point P(x, y) is equal to . Then equation of the curve is...A ray passing through (2, -3) is incident parallel to x-axis on a mirror lying along x2 - 4x + 8y + 12 = 0. Which of the...If 0 , then tanx is...Distance between line L & plane P where L : & P : 3x - 2z = 1 is equal to-...