Home
Class 11
PHYSICS
alpha and beta are the angle made by a v...

`alpha` and `beta` are the angle made by a vector from positive x `&` positive y-axes respectively. Which set of `alpha` and `beta` is not possible

A

`45^(@), 60^(@)`

B

`30^(@), 60^(@)`

C

`60^(@), 60^(@)`

D

`30^(@), 45^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D
`alpha, beta` must satisfy `cos^(2)alpha+cos^(2)beta+cos^(2)gamma=1`
Promotional Banner

Topper's Solved these Questions

  • MISCELLANEOUS

    ALLEN |Exercise Part -II Example|61 Videos

  • MISCELLANEOUS

    ALLEN |Exercise Part -II Example Some worked out Examples|1 Videos

  • KINEMATICS (MOTION ALONG A STRAIGHT LINE AND MOTION IN A PLANE)

    ALLEN |Exercise BEGINNER S BOX-7|8 Videos

  • PHYSICAL WORLD, UNITS AND DIMENSIONS & ERRORS IN MEASUREMENT

    ALLEN |Exercise EXERCISE-IV|7 Videos

Similar Questions

Explore conceptually related problems

alpha and beta are the angle made by a vector from positive x & positive y-axes redpectively. Which set of alpha and beta is not possible

Find out the angle made by (hati+hatj) vector from X and Y axes respectively.

Find out the angle made by vecA= hati+hatj+hatk vector from X, Y and Z axes respectively.

Find out the angle made by vecA=hati+hatj+hatk vector from X,Y and Z axes respectively.

Consider the family of planes x+y+z=c where c is a parameter intersecting the coordinate axes P, Q andR and alpha, beta and gamma are the angles made by each member of this family with positive x, y and z-axes. Which of the following interpretations hold good for this family?

If alpha, beta and gamma are angles made by the line with positive direction direction of X-axis, Y-axis and Z-axis respectively, then find the value of cos2alpha+cos2beta+cos2gamma .

Vector vecP angle alpha,beta and gamma with the x,y and z axes respectively. Then sin^(2)alpha+sin^(2)beta+sin^(2)gamma=

If alpha,beta,gamma be the angles which a line makes with the coordinates axes, then

A particle is projected from a point O with an initial speed of 30 ms^(-1) to pass through a point which is 40 m from O horizontally and 10 m above O. There are two angles of projection for which this is possible. These angles are alpha and beta . The value of |tan (alpha+beta)| is

If alpha" and " beta are the zeroes of the polynomial p(x)= 3x^(2)+11x+a , form a quadratic polynomial whose zeroes are 3alpha" and "3beta .