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If z1^2+z2^2+2z1.z2.costheta= 0 prove t...

If `z_1^2+z_2^2+2z_1.z_2.costheta= 0 ` prove that the points represented by `z_1, z_2`, and the origin form an isosceles triangle.

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CENGAGE PUBLICATION-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
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  4. If (a^2-1)x^2+(a-1)x+a^2-4a+3=0 is identity in x , then find the val...

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