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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 March 4, 2021, 5:49 pm ad1c9bdddf
    https://brainmass.com/math/trigonometry/trigonometric-identities-evaluation-without-calculator-12929

    Solution Preview

    Way 1
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    Note: root(3)=square root(3).

    Using the trig. identity : ...

    Solution Summary

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

    $2.49

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