[" If "tan(alpha)/(2),quad tan(beta)/(2)quad " are the roots of "],[8x^(2)-26x+15=0" then "cos(alpha+beta)=]

If tan((alpha)/(2)) and tan (( beta)/(2)) are the roots of the equation 8x^(2)-26x+15=0 then cos (alpha+ beta)=

If tan((alpha)/(2)) and (tan beta)/(2) are the roots of the equation 8x^(2)-26x+15=0 then the cos(alpha+beta) is equal to

If tan""(alpha)/(2)andtan""(beta)/(2) are roots of the equation 8x^(2)-26x+15=0 then cos(alpha+beta) = …………

If tan(alpha/2) and tan(beta/2) are the roots of the equation 8x^2-26x+15=0 then cos(alpha+beta) is equal to

If "tan"(alpha)/(2) and "tan"(beta)/(2) are the roots of the equation 8x^(2)-26x+15=0 , then find the value of "tan"((alpha+beta)/(2))

If tan "" (alpha )/(2) and tan "" (beta)/( 2) are the roots of the equation 8x ^(2) -26x + 15 =0, then find the value of cos (alpha + beta).

If tan "" (alpha )/(2) and tan "" (beta)/( 2) are the roots of the equation 8x ^(2) -26x + 15 =0, then find the value of cos (alpha + beta).

Q.If tan alpha and tan beta are the roots of equation x^(2)-12x-3=0, then the value of sin^(2)(alpha+beta)+2sin(alpha+beta)cos(alpha+beta)+5cos^(2)(alpha+beta) is

Q. If tan alpha and tan beta are the roots of equation x^2-12x-3=0 , then the value of sin^2(alpha+beta)+2sin(alpha+beta)cos(alpha+beta)+5cos^2(alpha+beta) is