Trigonometry
Law of Sines (side)
Side b given a, angle A, angle B.
Formula
Formula
b = a · sin Bsin A
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| a | known side | real number (ℝ) | — | input |
| A, B | angles (deg) | real number (ℝ) | deg | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givena = 10, angle A (deg) = 30, angle B (deg) = 45
Result14.14213562
Example 2
Givena = 7, angle A (deg) = 40, angle B (deg) = 60
Result9.431074487