I need to calculate the unknown quantity x and express answer in degrees, minutes & seconds. Pls advise if my calculations are correct and if not, could please assist me - thanks again.
tan^-1 (20/18)
x = 48.0128
x = 48^o, 0' & 46"
I need to calculate the unknown quantity x and express answer in degrees, minutes & seconds. Pls advise if my calculations are correct and if not, could please assist me - thanks again.
tan^-1 (20/18)
x = 48.0128
x = 48^o, 0' & 46"
No. Be very careful here. You can only use the trigonometric ratios when dealing with right triangles, and this is not a right triangle.
Here, we use the law of cosines:
(where the angle is opposite to side )
So, we have,
(we don't have to worry about other solutions, since )
Now see if you can convert to deg-min-sec.