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Maths stuff (Exact trig values (Sin (Sin0 (0), Sin30 (1/2), Sin45 (√2/2),…
Maths stuff
Exact trig values
Sin
Sin0
0
Sin30
1/2
Sin45
√2/2
Sin60
√3/2
Sin90
1
Cos
Cos0
1
Cos30
√3/2
Cos45
√2/2
Cos60
1/2
Cos90
0
Tan
Tan0
0
Tan30
√3/3
Tan45
1
Tan60
√3
Tan90
Undefined (asymptote)
Cosine rule
For a side
a^2 = b^2 + c^2 - (2bc cosA)
For an angle
CosA = (a^2 - b^2 + c^2) / (2bc)
Sine rule
For an angle:
SinA / A = SinB / B = SinC/C
Use the reverse to find a side
Quadratic Equation
