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Grade: 11

                        

(sinA)x 2 +2(cosA)x+(cosA+sinA)½ if this is a square of linear fn FIND GENRL VALUS FR A

8 years ago

Answers : (1)

Jitender Singh
IIT Delhi
askIITians Faculty
158 Points
							
Ans:
f(x) = (sinA)x^{2}+(cosA)(2x)+(cosA+sinA)^{1/2}
f(x) \rightarrow (x+1)^{2}
sinA =1...(1)
cosA =1….(2)
(cosA+sinA)^{1/2} =1…..(3)
From (1)
A = n\pi + \pi /2
From (2)
A = n\pi
From(3)
cosA+sinA = 1
(2)^{1/2}sin(A+\pi /4) = 1
sin(A+\pi /4) = \frac{1}{2^{1/2}}
A + \pi /4 = n\pi + \pi /4
A = n\pi
There is not any intersection between solution ot (1), (2) and (3)
A is an null set.
Thanks & Regards
Jitender Singh
IIT Delhi
askIITians Faculty
6 years ago
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