- #1
supernova1203
- 210
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For some of the questions questions the initial arm is in the positive x and y quadrent and the terminal arm moves counter clockwise (+)this is considered positive , for some of them it is in the negative x and positive y quadrent, how does one determine where the initial arm is to be placed, and in which direction the terminal arm moves?
An example is
determine the reciprocal trigonometric ratios for 210 degrees.
I began by placing the initial arm in the positive x and positive y quadrent, and then moving the terminal arm counter clockwise till i reach 210 degrees in the 360 circle, which lands me on the 3rd quadrent, negative x and negative y quadrent. And the remaining angle is 60 degrees according to my calculations, but the book shows that the remaining angle is only 30 degrees, which means the terminal arm moved clockwise instead of counter clockwise.
I have included the diagram, how does one determine from which way does the angle travel? clockwise or counterclock wise?
An example is
determine the reciprocal trigonometric ratios for 210 degrees.
I began by placing the initial arm in the positive x and positive y quadrent, and then moving the terminal arm counter clockwise till i reach 210 degrees in the 360 circle, which lands me on the 3rd quadrent, negative x and negative y quadrent. And the remaining angle is 60 degrees according to my calculations, but the book shows that the remaining angle is only 30 degrees, which means the terminal arm moved clockwise instead of counter clockwise.
I have included the diagram, how does one determine from which way does the angle travel? clockwise or counterclock wise?