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If I understand the question correctly, the answer is that it is simply a case of convention. For bearings, for example, the reference line is North and angles are measured clockwise. In 2-D polar coordinates, the reference line is the horizontal (going East) and angles are measured in the anti-clockwise direction.
What else can I help you with?
Why is 90 degree not taken as the angle of reference in trigonometry?
The angle of reference is in the first quadrant, and 90 degrees angle is not in the quadrant.
Why is 90 degrees taken as angle of reference in trigonometry?
It is not. The angle of reference is 2*pi radians or 360 degrees.
What is the reference angle of 90 degrees?
Quadrantals are their own reference angle, so 90 degrees.
Find the reference angle for the angle 59 degrees?
90 degrees
What is the angle reference for a right angle?
90 degrees
Can you find the reference angle of a quadrantal angle?
Yes. Quadrantal angles have reference angles of either 0 degrees (e.g. 0 degrees and 180 degrees) or 90 degrees (e.g. 90 degrees and 270 degrees).
What is the reference angle for 30 degrees?
A 30 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
What is 90 angle degrees?
A right angle is an angle of 90 degrees.
How many degrees is a right angle?
90 degreesThere are 90 degrees in a right angle.There are 90 degrees in a right angle
What is the reference angle for 17 degree?
17 degrees is an acute angle because it's greater than 0 but less than 90 degrees.
How many degrees is the right angle?
there is 90 degrees in a right angle derdder :):):):):):):):):):):):):)
What angle is exactly 90 degrees?
A right angle is an angle of 90 degrees.
