Science, Tech, Math › Math Law of Cosines Worksheets and Printables Share Flipboard Email Print Math Geometry Math Tutorials Arithmetic Pre Algebra & Algebra Statistics Exponential Decay Functions Worksheets By Grade Resources View More By Deb Russell Math Expert Deb Russell is a school principal and teacher with over 25 years of experience teaching mathematics at all levels. our editorial process Deb Russell Updated April 30, 2017 01 of 05 Law of Cosine Worksheet # 1 Law of Cosines Worksheet # 1. D. Russell 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 FormulaA 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. 02 of 05 Law of Cosine Worksheet # 2 Cosine Worksheet. D. Russell 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 FormulaA spreadsheet can also be used in cosines. 03 of 05 Law of Cosine Worksheet # 3 Triangle Worksheet. D. Russell 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 FormulaA spreadsheet can also be used in cosines. 04 of 05 Law of Cosine Worksheet # 4 Cosine Worksheet. D. Russell 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 FormulaA spreadsheet can also be used in cosines. 05 of 05 Law of Cosine Worksheet # 5 Find the Area of the Triangle. Determine which law of cosine to use to solve the area of the triangles, then answer the questions on the PDF above. 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 FormulaA spreadsheet can also be used in trig to find the cosines.