**Q1: **

Simplify .

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**Q2: **

Simplify .

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**Q3: **

Find the value of .

**Q6: **

Find the value of .

**Q7: **

Find the value of given without using a calculator.

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**Q8: **

Knowing that , find and .

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**Q9: **

Knowing that , find and .

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**Q10: **

Find the value of .

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**Q12: **

Find, without using a calculator, the value of given where .

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**Q13: **

Find, without using a calculator, the value of given where .

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**Q14: **

Find, without using a calculator, the value of given where .

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**Q16: **

Find, without using a calculator, the value of given where .

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