The trigonometric form of the complex number is
Here, r is the modulus of the complex number and theta is called the argument of the complex number.
The formula for the modulus of any complex number a+bi is defined as,
Substitute in the formula for modulus.
Since r is the modulus, it is always positive. So, r= 10.
The formula for the argument of the complex number is defined as,
Substitute in the formula for argument
The value of tan is for
So, the trigonometric form of the given complex number is
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