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The point P on the curve y=xtan alpha -1...

The point P on the curve `y=xtan alpha -1/2(x^2)/(u^2cos^2alpha),alphain(0,pi/2)` has a tangent parallel to y = x + 5. If the ordinate of P is `(u^2)/4` then `alpha=`

A

`15^@`

B

`30^@`

C

`45^@`

D

`60^@`

Text Solution

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The correct Answer is:
D
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ML KHANNA-TANGENTS AND NORMALS-SELF ASSESSMENT TEST (MULTIPLE CHOICE QUESTIONS)
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