11.8.2. Trigonometric Functions of the Sum and Difference of the Measures of Two Angles

Calculate .

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Calculate .

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Calculate .

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Which of the below is equal to ?

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If the electric current intensity is given by the relation , where is the current intensity and is time in seconds, find the electric current intensity after one second using the difference of measures of the two angles.

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Given that and , does ?

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Determine the solution set of the equation , given that .

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Find .

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Find .

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If , where , and , where , determine .

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Given that and , where and are measures of acute angles, find .

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Find in its simplest form.

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Find the value of .

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Determine the value of without using a calculator.

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