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NDA Math Complex Numbers

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Consider the following for the next three (03) items that follow:
Let z=‌

1+i‌sin‌θ

1−i‌sin‌θ

where i=√−1

[NDA II 2022]

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Question : 1

Total: 66

What is the modulus of z ?

1
√2
1+sin2θ
‌
1+sin2θ
1−sin2θ

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