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On the unit circle, at 30 degrees the point is ( sqrt(3)/2 , 1/2 )
Cosine "represents" the x value (x, y)
Therefore:
cos(30) = sqrt(3) / 2
It is highly advisable for you to memorize the unit circle -- at least the quadrant I angles (0, 30, 45, 60, and 90). I'll include a link to a good unit circle reference in the related links.
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Continue Learning about Math & Arithmetic
What is the cosine of a 59 degree angle?
cosine(59 degrees) = 0.51504 (rounded)
What is the cosine of a 50 degree angle?
cos(50) = 0.6428 (rounded)
What's the takeoff for a 30 degree angle?
The takeoff for a 30 degree angle will depend with the offset angle.
Is a 30 degree angle and a 30 degree angle congruent?
Yes and they are both acute angles
What is the complement of an angle with a measure of 30 degree?
a 60-degree angle
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