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If 0lt alphaltpi, then the quadratic que...

If `0lt alphaltpi,` then the quadratic question `cos(alpha-1)x^(2)+x cosalpha+sinalpha=0`, has

A

both roots imaginary

B

only one root imaginary

C

only one root irrational

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
D
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