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Mathematics

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Explanation & Answer

1 :- Cos (60 deg) = 18 / x

       x = 18 / Cos (60 deg)

       x = 18 / 0.5

       x = 36

       Sine (60 deg) = y / 18

       y = 18 * Sine (60 deg)

       y = 18 * 0.866

       y = 15.588

Or

       y = 16

2 :-  x = y * Cos (30 deg)

       y = x / Cos (30 deg)

3 :-  Cos (30 deg) = 7 / y

        y = 7 / Cos (30 deg)

        y = 7 / 0.866

        y = 8.083

4 :-  Cos (30 deg) = y / 6

       y = 6 * Cos (30 deg)

       y = 6 * 0.866

       y = 5.196

5 :-  Cos (60 deg) = 21 / y

       y = 21 / Cos (60 deg)

       y = 21 / 0.5

       y = 42

       Sine (60 deg) = x / 21

       x = 21 * Sine (60 deg)

       x = 21 * 0.866

       x = 18.186

6 :-  Cos (30 deg) = 9.5 / y

        y = 9.5 / Cos (30 deg)

        y = 9.5 / 0.866

        y = 10.96

Or

        y = 11


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