$\"\"$

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The trigonometric function is $\"\"$ .

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Converting the function into decimal degree form.

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$

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$\"\"$

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$\"\"$

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Use calculator to evaluate $\"\"$

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Function Calculator Keystrokes Display

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$\"\"$ $\"\"$ 1.3499 $\"\"$

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The value of the function is 1.3499.