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JEE Main Mathematics question

MathematicsComplex NumbersJEE Main

If , then is

Answer: 4

Solution

The numerator is and the denominator is \cos$Missing argument for \frac\fracθ2(Missing argument for \frac\fracθ2+iMissing argument for \frac\fracθ2)=2Missing argument for \frac\fracθ2·

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Question ID VK-013803