- #36
skj91
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Also when dealing with sin and cos in equations where you are solving for real values of x and y, you can and will have results which have a negative value (i.e. -1) due to the way sine waves are graphed and the concept of the 'unit circle' where 0° -- (which is at the same location as 360° which is a full circle of 2π length with a center point at the coordinate (0,0) and starting point of the arc swept by its radius at the coordinate (1,0) -- will yield a value of -1 for x when the arc formed by the radius pivots around the the (0,0) point by 180° and lands on π, horizontally aligned with the x-axis. Inversely you will get a value of -1 for y when it swings another 90° past that to the 270° mark vertically aligned with the y-axis. You will, however, never produce a negative value for the radius (which is also always representative of a triangle's hypotenuse, when graphed).
Or you could go with the difference or sum of sines rules but that's probably more of a headache to get through than it's worth . Go with the ± operation on the quadratic equation over that crazy stuff.
And don't forget Pythagoreas, you may need to make use of his:
a2 + b2 = c2
theorem at some point.
(or x2 + y2 = h2 in this case)
Or you could go with the difference or sum of sines rules but that's probably more of a headache to get through than it's worth . Go with the ± operation on the quadratic equation over that crazy stuff.
And don't forget Pythagoreas, you may need to make use of his:
a2 + b2 = c2
theorem at some point.
(or x2 + y2 = h2 in this case)
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