Magnitude of resultant forces

Homework Statement

Forces with magnitude of 200 newtons and 300 newtons act on a hook. The angle between the two forces is 65°. Find the magnitude of the resultant of these forces. Round your answer to 2 decimal places. (Hint: write the 300 pound force as a vector in the direction of the positive x-axis and the 200 pound force as a vector at an angle of 65° with the positve x-axis.)

I'm in college trig and was given this question. I'm confused as to how to go about setting it up (I attached a file indicating the method i was going about it with)

The Attempt at a Solution

My guess was to do something like sqrt[(200*sin(65))^2+(300*cos(65))^2]

However, I'm unsure if this would yield a correct answer. Any insight would be greatly appreciated

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hi oranrene! welcome to pf!

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(Hint: write the 300 pound force as a vector in the direction of the positive x-axis and the 200 pound force as a vector at an angle of 65° with the positve x-axis.)

My guess was to do something like sqrt[(200*sin(65))^2+(300*cos(65))^2]
(there's no attachment )