$\"\"$

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a).

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The trigonometric function is $\"\"$ .

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Convert the function into decimal degree form.

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$\"\"$

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$\"\"$

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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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$\"\"$ $\"\"$ 5.0273

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$\"\"$

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b).

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The trigonometric function is $\"\"$ .

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Convert the function into decimal degree form.

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$\"\"$

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$\"\"$

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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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$\"\"$ $\"\"$ 0.1989 $\"\"$

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Therefore,

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(a) The value of $\"\"$ is 5.0273.

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(b) The value of $\"\"$ is 0.1989.