### Law of Cosine Worksheet # 1

Print the Cosine Worksheet/Printable in PDF Determine which law of cosine to use and answer the worksheet questions.

Print PDF worksheet above, the answers are on the 2nd page of the PDF. Determine the area of the triangle to the nearest tenth. Use the appropriate Cosine formula (law of cosine) to calculate the area of the triangle. The answers are on the 2nd page of the PDF.

Trig Formula

A spreadsheet can also be used in cosines.

Prior to working with the trigonometry formulas/laws of cosines, learners should understand Pythagorean's Theorem, area and perimeters of triangles as well as having a strong understanding of angles. Typically, sin and cosine are addressed in the ninth or tenth grades in most jurisdictions.

### Law of Cosine Worksheet # 2

Print the Cosine Worksheet/Printable in PDF Determine which law of cosine to use to solve the area of the triangle. The answers are on the 2nd page of the PDF worksheet.

Print PDF worksheet below, then find the area of the triangle and answer to the nearest tenth. Use the Cosine formula (law of cosine) to calculate.

Trig Formula

A spreadsheet can also be used in cosines.

### Law of Cosine Worksheet # 3

Print the Cosine Worksheet in PDF. Determine which law of cosine to use to solve the following, then answer the questions on the PDF.

Print PDF worksheet above, answers are on the 2nd page of the PDF. Use the Cosine formula (law of cosine) to calculate the area of the triangle to the nearest tenth.

Trig Formula

A spreadsheet can also be used in cosines.

### Law of Cosine Worksheet # 4

Determine which law of cosine to use to solve the following, then answer the questions on the PDF.

Print PDF worksheet below, answers are on the 2nd page of the PDF. Determine the missing unit to find the area of the triangle and answer to the nearest tenth. Use the Cosine formula (law of cosine) to calculate.

Trig Formula

A spreadsheet can also be used in cosines.

### Law of Cosine Worksheet # 5

Print the PDF worksheets with the answers on the 2nd page of the PDF. Find the area of the triangle and answer to the nearest tenth. Use the Cosine formula (law of cosine) to calculate.

Trig Formula

A spreadsheet can also be used in trig to find the cosines.