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Home > A2C > Chapter 1 > Lesson 1.2.1 > Problem 1-61


For each diagram below, write and solve an equation to find the value of each variable. Give your answer to part (d) in both radical and decimal form. For a reminder of the trigonometry ratios, refer to the Math Notes box for this lesson. Homework Help ✎

  1. triangle a

    triangle a hints

    Use your calculator to compute . Does your answer seem reasonable? If not, verify that your calculator is in degree mode.

  1. triangle b

    Follow the steps in part (a).

  1. triangle c

    How can you "undo" cosine?

  1. triangle d

    An angle is not marked, just three sides. What formula uses three sides of a right triangle?

    Pythagorean Theorem