Law of Cosines Calculator: Solve Triangles with Ease

The Law of Cosines is a formula in trigonometry that relates the sides and angles of a triangle. It’s especially useful when you don’t have a right triangle, since the Pythagorean Theorem only applies to right-angled cases.

The formula is:

c²=a²+b²−2ab⋅cos(C)

Here,

• a, b, c are the sides of the triangle
• C is the angle opposite side c

With this formula, you can calculate a missing side when two sides and the included angle are known, or determine an angle if all three sides are given.

How the Calculator Works

The Law of Cosines Calculator automates this process. Instead of doing manual calculations, you enter the known sides and angles, and the tool instantly solves for the unknown value.

Features include:

• Solving for missing sides or angles
• Showing the applied formula for clarity
• Handling both side-angle-side (SAS) and side-side-side (SSS) triangle cases

Common Use Cases

The tool is practical for:

• Trigonometry students working through practice problems
• Engineers and architects performing geometric calculations
• Anyone who needs quick and accurate triangle measurements without manual math

It is straightforward and user-friendly. The interface allows you to input your known values and instantly see results, which saves time and reduces the risk of errors.

Get Started

If you’re solving triangle problems and want accurate results without the hassle of manual math, try the Law of Cosines Calculator today. It’s free, fast, and reliable.

https://onl.li/tools/law-of-cosines-calculator-293