I worked out 25^{0} is approximately 0.4 radians so I am going to solve that way.
Consider the line from the center (0,0) of the circle to the point like a vector.
X = r cos(θ) =
Y = r sin(θ) =
So put your calculator in radians mode
and plug the values into the equations using θ = 0.42857 rad.
Or put your calculator in degrees mode
and plug the values into the equations using θ = 25 degrees.
There are other ways and equations to use to get the answer, but those are to me
the easiest to learn; and they will be useful when you take physics too.
Important note: Those equations always work, but Only when you use the angle to the + x axis. So if you are given a different angle use your geometry of a circle 360^{0}, a line 180^{0}, and a right angle 90^{0} to find the angle to the + x axis - then proceed.
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