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# NCERT Solutions class-11 Maths Exercise 5.2

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Exercise 5.2

Find the modulus and the argument of each of the complex numbers in exercises 1 to 2.

1.

Ans. Given:

and

Squaring both sides and adding both the equations, we get

and

and

Therefore, and arg

2.

Ans. Given:

and

Squaring both sides and adding both the equations, we get

and

and

Therefore, and arg

Convert each of the complex numbers given in Exercises 3 to 8 in the polar form.

3.

Ans. Given:

and

Squaring both sides and adding both the equations, we get

and

and

Therefore, Polar form of is

4.

Ans. Given:

and

Squaring both sides and adding both the equations, we get

and

and

Therefore, Polar form of is

5.

Ans. Given:

and

Squaring both sides and adding both the equations, we get

and

and

Therefore, Polar form of is

6.

Ans. Given:

and

Squaring both sides and adding both the equations, we get

and

and

Therefore, Polar form of is

7.

Ans. Given:

and

Squaring both sides and adding both the equations, we get

and

and

Therefore, Polar form of is

8.

Ans. Given:

and

Squaring both sides and adding both the equations, we get

and

and

Therefore, Polar form of is

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