exam
Maths Puzzle
Numerical Ability
Verify the identity.
(cos(x) - cos(y))/(sin(x) + sin(y)) + (sin(x) - sin(y))/(cos(x) + cos(y)) = 0
Read Solution (Total 0)
exam Other Question
the problem is this: 9x + 4y
-6x - 5y
(n-1)(n)(n+1)=210