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Lesson 3

1. Lesson 3

1.2. Are You Ready?

Mathematics 20-3 Module 4

Module 4: The Right Kind Of Triangles

 

Are You Ready?

 


caution

Before doing any trigonometric calculations, you must make sure that your calculator is in degree mode. Refer to the user manual or ask your teacher if you are not sure how to check.

  1. Identify the hypotenuse, opposite, and adjacent sides in right triangles in Exploring Trigonometry Interactive.

    This play button opens the Exploring Trigonometry interactive for determining opposite and adjacent sides, and the hypotenuse, in a right triangle.

  2. Define angles of elevation and angles of depression. Answer

  3. Answer the following questions. Round to four decimal places. Make sure your calculator is in degree mode.

    1. tan 34° Answer

    2. cos 65° Answer

    3. sin 12° Answer

  4. Answer the following questions. Round to the nearest degree. Make sure your calculator is in degree mode.

    1. tan θ = 1.2743 Answer

    2. cos θ = 0.1342 Answer

    3. sin θ = 0.5641 Answer