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नीचे दिए गए प्रश्न के लिए अनुच्छेद

Let z = a + ib (a, bR) be a complex number. Modulus of z defined as |z|=a2+b2 and argument of z is arg(z)=tan1ba.

माना z = a + ib (a, bR) एक सम्मिश्र संख्या है। z का मापांक |z|=a2+b2 के रूप में परिभाषित है तथा z का कोणांक arg(z)=tan1ba है।

Q. If z = –1 + 2i, then the principal argument of z is

प्रश्न - यदि z = –1 + 2i, तब z का मुख्य कोणांक है

A
–tan–12
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B
tan–12
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C
π – tan–12
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D
–π + tan–12
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Solution

The correct option is C π – tan–12
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