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A particle moves in a plane with a const...

A particle moves in a plane with a constant speed along a path `y=2x^(2)+3x-4` When the particle is at (0,-4) the direction along which it is moving is inclined to the X axis at an angle. Given `tan^(-2) 3=72^(@)`

A

`63^(@)`

B

`72^(@)`

C

`27^(@)`

D

`0^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`(dy)/(dx)=4x+3=3("at" x=0)`
`:. tan theta =3" "0 =72^(@)`
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RESONANCE-DAILY PRACTICE PROBLEM-DPP No.56
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