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    How do I evaluate the following trigonometric expression involving special angles?

    1. sin60° cos30° - cos45° sin45°

    2. tan60° - tan45° / 1 + tan60° tan45°

    3. [1 + cot² 30°]³

    Please explain.

    © BrainMass Inc. brainmass.com December 24, 2021, 7:26 pm ad1c9bdddf
    https://brainmass.com/math/trigonometry/evaluate-trigonometric-expression-190084

    SOLUTION This solution is FREE courtesy of BrainMass!

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    trigonometric expression involving special angles
    How to evaluate the following trigonometric expression involving special angles?
    The values of the trigonometric function of these special angles are well known. So we just need to substitute the values to the expression and evaluate it.
    For example:

    Then we can find the tan and cot values of these angles.

    1. sin60° cos30° - cos45° sin45° =

    2. tan60° - tan45° / 1 + tan60° tan45°

    3. [1 + cot² 30°]³

    please explain.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 7:26 pm ad1c9bdddf>
    https://brainmass.com/math/trigonometry/evaluate-trigonometric-expression-190084

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