Henry has red marbles and blue marbles. The ratio of the number of his red marbles to blue marbles is 5:7 . If Henry has 63 blue
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so... notice the picture below, the angle in the fourth quadrant
now... notice, the cosine is just the distance the angle makes with the x-axis
so... using the pythagorean theorem, get the opposite side, from that triangle, keeping in mind that, "y" is negative in the 4th quadrant
once you get "y", get any other trigonometry value you need :)
