Ask a Question

If tan α/2 and tan β/2 are roots of the equation 8x^2 – 26x + 15 = 0 then cos(α + β) =

+3 votes
in JEE by kratos

If tan α/2 and tan β/2 are roots of the equation 8x2– 26x + 15 = 0 then cos(α + β) =

(a) - 627/725

(b) - 627/725

(c) 1

(d) of these

1 Answer

+2 votes
by kratos
 
Best answer

Correct option (a) -627/725

Explanation:

Snow Theme by Q2A Market
Powered by Question2Answer

Copyright © QinStar.in

...