1.

Let 0 le a,b,c,d le piwhere b,c are not complementary such that 2cosa + 6cos b + 7cosc + 9cosd = 0 and 2sina-6sinb + 7 sinc-9sind=0 .Then the value of (cos(a+d))/(cos(b+c)) =

Answer»

`1//3`
`3//4`
`5//4`
`7//3`

ANSWER :D


Discussion

No Comment Found