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    Trigonometric Identities : Evaluation without Calculator

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    Show two ways of evaluating the following expression, without using a calculator.

    sin 2(pi/3)

    © BrainMass Inc. brainmass.com December 24, 2021, 4:52 pm ad1c9bdddf

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    Way 1

    Note: root(3)=square root(3).

    Using the trig. identity : ...

    Solution Summary

    Trigonometric identities are used to evaluate an expression without using a calculator.