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Special right triangles and their trigonometric functions
(1) 45-45-90 triangle: two equal sides x with equal angles
and hypotenuse x times square root of 2:
(2) 30-60-90 triangle: shorter side x, longer side x times
square root of 3, and hypotenuse 2x:
Table of trigonometric functions for these angles:
sine
30 degrees
1/2
45 degrees
(sqrt 2)/2
cosine
(sqrt 3)/2
(sqrt 2)/2
tangent
(sqrt 3)/3
1
60 degrees
(sqrt 3)/2
1/2
sqrt 3
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