$\"\"$

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(a)

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The trigonometric function is $\"\"$ .

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First 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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$\"\"$ $\"\"$ 0.9964

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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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$\"\"$ $\"\"$ 1.0036

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$\"\"$

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(a) The value of $\"\"$ is 0.9964.

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(b) The value of $\"\"$ is 1.0036.