PC.FGR.3.3
Define the six trigonometric ratios in terms of x, y, and r using the unit circle centered at the origin of the coordinate plane. Interpret radian measures of angles as a rotation both counterclockwise and clockwise around the unit circle.
Example Problems
Find the exact value:
Find the exact value:
Find .
Khan Academy ResourcesTrig unit circle reviewUse ratios in right trianglesRelate ratios in right trianglesTrig values of special anglesTrig values of π/6, π/4, and π/3Trig identities from reflections and rotationsUnit circleTangent identities: symmetrySine & cosine identities: periodicitySine & cosine of complementary anglesRadian angles & quadrantsTrig values of π/4Tangent identities: periodicitySine & cosine identities: symmetryCosine, sine and tangent of π/6 and π/3The trig functions & right triangle trig ratiosUsing complementary anglesTrig word problem: complementary angles

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