Algebra and Trigonometry, 8th edition
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PAGE: 601SET: ExercisesPROBLEM: 6
Please look in your text book for this problem Statement

Observe the right triangle figure, the sides are .

                (Write alternative form of cosines law)

                (Substitute )

                (Apply property of exponents)

                               (Simplify)

                         (Multiply each side by )

                                     (Use calculator)

                        (Write reciprocal form of sines law)

                    (Substitute )

                  (Multiply each side by 3)

                           (Use calculator)

                     (Multiply each side by )

                                 (Use calculator)

In a triangle, the total of three angles is .

           (Write total of three angles)

    (Substitute )

                           (Subtract from each side)

The angles are .



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