Given that :

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$\"\"$ -------->(1)

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$\"\"$ --------->(2)

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To find $\"\"$ ,

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Apply formula : $\"\"$ .

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From (2)

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$\"\"$

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From (1)

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$\"\"$

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$\"\"$

\

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .