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[ 1/1 Equation]
    Work: Find the solution of equation cot90 = 0 .
    Question type: Equation
    Solution:Original question:

c

×

90

=

0

    The coefficient of the unknown number is reduced to 1 :

c

=

0

÷

90

=

0

×

1 90

    We obtained :

c

=

0

    This is the solution of the equation.

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