GATE IN 1997 | Complex Variable Question 10 | Engineering Mathematics

GATE IN 1997

MCQ (Single Correct Answer)

-0.3

The complex number $$z\, = \,x\, + \,jy$$ which satisfy the equation $$\left| {z + 1} \right|\, = \,1$$ lie on

a circle with ( 1, 0 ) as the center and radius 1

a circle with ( - 1, 0 ) as the center and radius 1

y-axis

x-axis

GATE IN 1994

MCQ (Single Correct Answer)

-0.3

The real part of the complex number $$z\, = \,x\, + \,iy$$ is given by

$${\mathop{\rm Re}\nolimits} (z)\, = \,z\, - \,{z^*}$$

$${\mathop{\rm Re}\nolimits} (z)\, = \,{{z\, - \,{z^*}} \over 2}$$

$${\mathop{\rm Re}\nolimits} (z)\, = \,{{z\, + \,{z^*}} \over 2}$$

$${\mathop{\rm Re}\nolimits} (z)\, = \,z\, + \,{z^*}$$

GATE IN 1994

MCQ (Single Correct Answer)

-0.3

$$\cos \phi $$ can be represented as

$${{{e^{i\phi }}\, - \,{e^{ - i\phi }}} \over 2}$$

$${{{e^{i\phi }}\, - \,{e^{ - i\phi }}} \over {2i}}$$

$${{{e^{i\phi }}\, + \,{e^{ - i\phi }}} \over i}$$

$${{{e^{i\phi }}\, + \,{e^{ - i\phi }}} \over 2}$$

GATE IN Subjects

Engineering Mathematics