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What is the use of proj() function?

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What is the use of proj() function?

(a) Used to calculate the argument of a complex number

(b) Used to calculate the conjugate of a complex number

(c) Used to calculate the negative of a complex number

(d) Used to calculate the projection of a complex number

I have been asked this question by my school teacher while I was bunking the class.

My doubt is from Complex Library in chapter Class Hierarchies, Library & Containers of C++

1 Answer

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Best answer
Correct choice is (d) Used to calculate the projection of a complex number

The best explanation: <complex> header provides proj() function to calculate the projection of a complex number a + ib.

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