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The weight of a giant panda is 10 times the weight of a red panda. The combined weight of the pandas is 220 pounds. What is the
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Every point in the unit circle is identified either by its coordinates or by the angle it forms with the x-axis,
.
The trigonometric functions associate with every angle and the correspondant
coordinates the two values
This procedure can be done for every angle , so you don't have to work with acute angles only.