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A Quadrantal angle is an angle that is not in Quadrant I. Consider angle 120. You want to find cos(120) . 120 lies in quadrant II. Also, 120=180-60. So, it is enough to find cos(60) and put the proper sign. cos(60)=1/2. Cosine is negative in quadrant II, Therefore, cos(120) = -1/2.
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If an angle measures 245 what is the name of the angle?
obtuse angle
If an angle measure 270 degrees what kind of angle is it?
That's a reflex angle. 0 to <90 Acute angle 90 Right angle >90 to <180 Obtuse angle 180 Straight angle >180 to <360 Reflex angle 360 called Full circle
Which type of angle has a 133 degree?
An obtuse angle.
What is a 213 degree angle?
An angle of 213 degrees is a reflex angle
What is trigonometric angle?
just an angle, like any other angle.
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