Law of Cosines Teacher Resources

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In this law of cosines activity, students use the law of cosines to solve equations containing a triangle. They find the area of a triangle and determine the length of one side of a triangle. This two-page activity contains eight multi-step problems.
In this law of cosines worksheet, high schoolers determine angle measures, area, and number of solutions in five multiple choice problems by applying the law of cosines.  The solutions are provided by clicking on the "Check It" button found on the bottom of the page.
Students solve problems using the law of cosines. In this precalculus lesson, students meet different criteria as they solve problems. They apply the formula for cosines to solve word problems.
In this law of cosines worksheet, students determine the length of one side of a triangle. They find the angle measurement of one angle in a triangle. This two-page worksheet contains eight problems.
This worksheet provides excellent practice in applying the Law of Sines and the Law of Cosines. It consists of six problems, each of which presents a real-world scenario with an accompanying diagram. The task in each exercise is to answer a specific question about the scenario. To answer the question, learners must use the appropriate law and interpret the result within the context of the problem. You could use these exercises in several different ways. Set up stations around the classroom with an exercise at each station, use them for independent practice or homework, have students work in groups to complete them, or use them for assessment.
Sal solves an interesting question in this video from a college entrance exam in India that requires one to use knowledge of arithmetic progressions, trigonometric identities, and algebra. He works through solving the problem in a step-by-step fashion by talking through his thought process in order to help one follow the solution as well as understand why certain steps are taken.
Sal solves an interesting question in this video from a college entrance exam in India that requires one to use knowledge of arithmetic progressions, trigonometric identities, and algebra. He works through solving the problem in a step-by-step fashion by talking through his thought process in order to help one follow the solution as well as understand why certain steps are taken.
In this part 2 video, Sal finishes the trigonometric word problem of the wayward ship captain. He wisely continues the algebra work on the problem before finally turning to his calculator for the very last calculation.
Sal continues the Ferris wheel problem in a previous video by graphing the function between zero and 30 seconds.
Need a quick calculation for the area of an ellipse, or the volume of the triangular pyramid? There are 39 different solvers in this app, to give you the answer to numerous geometry and trigonometry problems.
Students research the Tower of Pisa and write a report about its history. They examine the physics of why it leans and whether it might fall. Students plan a trip to Italy to view the Tower. They develop an itinerary and budget for the trip.
In this trigonometry learning exercise, learners use the sine and cosine law to solve problems. They investigate obtuse triangles using these laws. There are 40 questions.
In this math review worksheet, students review for their exam using a variety of worksheets on different topics. There are 34 problems plus some word problems in the worksheet booklet.    
In this geometric mean and Pythagorean Theorem worksheet, 10th graders solve 94 various types of problems related to determining the geometric mean and using the Pythagorean Theorem to measure triangles. They find the indicated trigonometric ratio as a fraction and as a decimal rounded to the nearest ten-thousandth. Students also draw a given triangle and write an equation to use to find the unknown values.
In this geometric calculations of solar storms worksheet, students use a diagram indicating the location of 2 STEREO satellites, the earth and the sun to calculate the distance between a Coronal Mass Ejection and the Earth. They use scaled construction or geometric calculations to solve for their answers. They also determine how long it takes for the Coronal Mass Ejection to reach the sun.
In this solar storms worksheet, students use a diagram given the location of two STEREO spacecraft satellites, a coronal mass ejection, the sun and the Earth to solve 2 problems about the coronal mass ejection. Students use segments, angles and trigonometric identities to determine the length of a segment in the diagram. They determine the length the coronal mass ejection traveled and the time it took to travel that length.
In this trig learning exercise, 12th graders identify the angles of a tight triangle using sine, cos and tan combined with the given sides. There are 23 problems broken down in 4 sections.
In this math worksheet, students perform basic operations all the way up to precalculus. They graph, identify slopes, plot data and analyze it. There are 34 questions.
Twelfth graders review the 6 identities of trigonometry. In this trig lesson, 12th graders review the importance of the right triangle as it relates to sine, cosine and tangent. They review the basic trig identities and how it relates to solving equations through substitution.
In this math worksheet, students review for the regents high school examination. They review basic concepts of geometry and algebra. There are 30 questions varying in lengths.

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