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The acute angle between the straight lin...

The acute angle between the straight lines whose direction numbers are 1, 1, 2 and `(sqrt(3)-1),(-sqrt(3),-1), 4` is -

A

`(pi)/(6)`

B

`(pi)/(3)`

C

`(pi)/(4)`

D

`(5pi)/(12)`

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The correct Answer is:
B
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 8
  1. The coordinates of the point where the line through the points (2, -3,...

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  2. The equation of the plane passing through the point (1, -2, 3) and per...

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  3. The acute angle between the straight lines whose direction numbers ar...

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  4. The vector equation of the plane passing through the point (1, -1, 2) ...

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  5. If the vectors veca= 3x hati+4y hatj-12hatk and vecb=3x hati-4y hatj+1...

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  6. If veca, vecb, vec c are three mutually perpendicular vectors and |vec...

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  7. Find the range of the function f(x) =abs(x - 1) + abs(x - 2) , -1 le x...

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  8. In the mean value theorem f(b)-f(a)=(b-a)f'(c )(a lt c lt b), "if " a=...

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  9. The value of lim(x to 0) (27^(x)-9^(x)-3^(x)+1)/(log(e)(1+(x^(2))/(2)...

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  10. The value of lim(x to 0) (1-3x)^((3)/(x)) is equal to -

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  11. If x sqrt(1-y^(2))+y sqrt(1-x^(2))=k, then the value of (dy)/(dx) at...

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  12. If x=a cot theta and y=(1)/(x^(2)+a^(2)), then the value of (d^(2)...

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  13. If y=(sin^(-1)x)^(2)+(cos^(-1)x)^(2), then which of the following is...

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  14. If y=e^(m sin^(-1)x), then the value of [(d^(2)y)/(dx^(2))](x=0) is ...

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  15. If x sqrt(1+y)+y sqrt(1+x)=0 then the value of (dy)/(dx) is -

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  16. If x^(2)+y^(2)=t+(1)/(t) and x^(4)+y^(4)=t^(2)+(1)/(t^(2)), then the ...

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  17. If siny=x sin(a+y), then the value of (dy)/(dx) is -

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  18. If y="tan"^(-1)(sqrt(1+x^(2))-sqrt(1-x^(2)))/(sqrt(1+x^(2))+sqrt(1-x^(...

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  19. If the equation a(n)x^(n)+a(n-1)x^(n-1)+…+a(1)x=0 (a(1) ne 0, n ge 2)...

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  20. If x sin y+y cos x=pi, then the value of y''(0) is -

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