positive and negative angles of 87 degrees
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To find the complement of a negative angle, you first need to determine its positive equivalent by adding 360 degrees to the negative angle. Once you have the positive angle, you can then find its complement by subtracting the angle from 90 degrees. This will give you the complement of the negative angle in the range of 0 to 90 degrees.
All the angles in 4th quadrant have positive cosine and negative sine e.g. 280,290,300,310...etc.
The result will always be negative. Positive X Positive = Positive Negative X Negative = Positive Positive X Negative = Negative
positive X positive = positive positive X negative = negative negative X positive = negative negative X negative = positive
Positive x Positive =Positive Positive x Negative= Negative Negative x Positive= Negative Negative x Negative =Positive