cos -1 [ 3/5 cosx + 4/5sinx ] find its value?
cos -1 [ 3/5 cosx + 4/5sinx ] find its value?
I can ' t understand this question . please explain it briefly ?
cos -1 [ 3/5 cosx + 4/5sinx ] find its value?
I can ' t understand this question . please explain it briefly ?