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See image.
You can also try to get the x- and y-components of both forces (red vectors).
There are two 30-60-90 triangles in this situation, so the components are readily known. (black horizontal and vertical vectors).
Only after this, when you have to find the magnitude and angle of the resultant force (blue vector), you have to use the Pythagorean Theorem and a sin, cos or tan, and this will make rounding off necessary.

thank you guys!

i just needed guidance in the right direction not the answer

i got 107.12?

.... yeah, I was reading it incorrectly :) thanx

YW!

thank you