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1/2
sin(π/6)
√3/2
cos(π/6)
1/√3 or √3/3
tan(π/6)
√2/2
sin(π/4)
√2/2
cos(π/4)
1
tan(π/4)
√3/2
sin(π/3)
1/2
cos(π/3)
√3
tan(π/3)
0
sin(π)
-1
cos(π)
0
tan(π)
1
sin(π/2)
0
cos(π/2)
1
lim (x→0) (sin x)/x
1
lim (x→0) (tan x)/x
0
lim (x→0) (1-cos x)/x
1/2
lim (x→0) (1-cos x)/x^2
1
sin^2 x + cos^2 x
sec^2 x
1 + tan^2 x
csc^2 x
1 + cot^2 x