Unity C trigonometric function, right triangle corner calculation

right triangle

 1、 right triangle , Two right angle sides are known ab, Find the chord length c.

ps：Mathf.Pow() Function to the power ,Mathf.Sqrt() Is the square root

// According to Pythagorean Theorem (a²+b²=c²) Find the length of the support rod , open c The square root of the string gets the length of the string 
float c = Mathf.Sqrt(Mathf.Pow(a, 2) + Mathf.Pow(b, 2));

2、 right triangle , Known side length , Find the angle .

ps：Mathf.Asin() Is a sine function sin,Mathf.Tan() Is a tangent function tan

// Angle ∠β angle  = sin(a/c)/π*180, namely   angle  =  radian /π*180
float β = Mathf.Asin(a / c) / Mathf.PI * 180;

// Tangent function tan seek   Angle ∠α =  Opposite side b Divide by adjacent edge a
float α = b / a;

// Angle ∠α = 90 - ∠β. right triangle , The sum of the two angles equals 90°
float α = 90 - β;

The formula relationship between angle and radian ：

angle = radian / π * 180

radian = angle  / 180 * π

3、 right triangle , A right angle edge is known a, And angle ∠α, Seeking side length b

// Side length b =  Angle ∠α Multiply by adjacent edges a
float b = α * a;