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प्राचल alpha in [0,2pi] के उन मानो की ...

प्राचल `alpha in [0,2pi]` के उन मानो की संख्या जिनके लिये द्विघात फलन `(sinalpha)x^(2)+(2cos alpha)x+1/2(cosalpha+sin alpha)` एक रेखीय फलन का वर्ग है होगी

A

2

B

4

C

1

D

3

लिखित उत्तर

Verified by Experts

The correct Answer is:
A
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