Step 1:

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(a)

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The value of $\"\"$ is $\"\"$ .

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Find the reference number $\"\"$ .

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The reference number $\"\"$ associated with $\"\"$ is the shortest distance along the unit circle between the terminal points determined by $\"\"$ and $\"\"$ -axis.

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$\"\"$ $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Reference number is $\"\"$

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Step 2:

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(b)

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The value of $\"\"$ is $\"\"$ .

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Find the reference number $\"\"$ .

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$\"\"$ $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Reference number is $\"\"$

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Step 3:

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(c)

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The value of $\"\"$ is $\"\"$ .

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Find the reference number $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Reference number is $\"\"$

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Step 4:

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(d)

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The value of $\"\"$ is $\"\"$ .

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Find the reference number $\"\"$ .

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$\"\"$ $\"\"$

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$\"\"$

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Reference number is $\"\"$