Adjacent: adjacent (next to) the angle θ
Opposite: opposite the angle θ
Hypotenuse: longest side (and opposite the right angle)

To use this page:
GivenValue
Hypotenuse
Theta (in degrees)
Usex = r * cos(θ)
y*y = r*r - x*x
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GivenValue
Adjacent
Theta (in degrees)
User = x/cos(θ)
y*y = r*r - x*x
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GivenValue
Opposite
Theta (in degrees)
User = y/sin(θ)
x*x = r*r - y*y
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GivenValue
Adjacent
Hypotenuse
Useθ = arccos(x/r)
y*y = r*r - x*x
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GivenValue
Opposite
Hypotenuse
Useθ = arcsin(y/r)
x*x = r*r - y*y
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GivenValue
Opposite
Adjacent
Useθ = arctan(y/x)
r*r = x*x + y*y
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