Sin, Cos And Tan
Adjacent, Opposite Side And Hypotenuse
Sin
Sin x = Opposite / Hypotenuse
Sin tells us the ratio of sides in a triangle based on an angle.
The formula of sin is easy to remember by the term SOH, as sin = Opposite/Hypotenuse
Cos
Cos x = Adjacent / Hypotenuse
Cosine of an angle is the ratio of the side next to the angle (adjacent) to the longest side (hypotenuse).
Cos can be remember as CAH, C = Adjacent / Hypotenuse
Tan
Tan x = Sin/Cos or Opposite / Adjacent
Tan = sin/cos ?, this is because sin = opposite / hypotenuse and cos = adjacent / hypotenuse Sin/cos = opposite/hypotenuse/ adjacent/ hypotenuse hypotenuse gets canceled sin/cos = opposite/adjacent
Tangent tells you the ratio between the opposite and adjacent side
Tan is easy to remember by TOA, t = opposite/adjacent
SOH, CAH And TOA
SOH, CAH And TOA are prefixes that assist you to remember trigonometric formulas