Maths-
General
Easy
Question
In 
Hint:
To simplify the given question we will first use the projection formula and then using other trigonometric identities we will simplify the question.
The correct answer is:
Related Questions to study
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On Bohr’s stationary orbits -
On Bohr’s stationary orbits -
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For a valid Bohr orbit, its cicumfrence should be -
For a valid Bohr orbit, its cicumfrence should be -
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Arrange the following particles in increasing order of values of e/m ratio: Electron (e), proton (p), neutron (n) and α-particle (α) -
Arrange the following particles in increasing order of values of e/m ratio: Electron (e), proton (p), neutron (n) and α-particle (α) -
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In 
In
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An antenna behaves as resonant circuit only when its length is
An antenna behaves as resonant circuit only when its length is
physics-General
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If 
If
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In the adjoining diagram, a wavefront AB, moving in air is incident on a plane glass surface XY. Its position CD after refraction through a glass slab is shown also along with the normals drawn at A and D. The refractive index of glass with respect to air (
) will be equal to
In the adjoining diagram, a wavefront AB, moving in air is incident on a plane glass surface XY. Its position CD after refraction through a glass slab is shown also along with the normals drawn at A and D. The refractive index of glass with respect to air () will be equal to
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Which statement is not correct for n=5,m=2:
Which statement is not correct for n=5,m=2:
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In P-atom find out the no. of paired electrons for l=1 and m =0-
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chemistry-General
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For H- atom, the energy required for the removal electron from various sub-shells is given at under:
The order of the energies would be:
For H- atom, the energy required for the removal electron from various sub-shells is given at under:
The order of the energies would be:
chemistry-General
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Immiscible transparent liquids A, B, C, D and E are placed in a rectangular container of glass with the liquids making layers according to their densities. The refractive index of the liquids are shown in the adjoining diagram. The container is illuminated from the side and a small piece of glass having refractive index 1.61 is gently dropped into the liquid layer. The glass piece as it descends downwards will not be visible in
Immiscible transparent liquids A, B, C, D and E are placed in a rectangular container of glass with the liquids making layers according to their densities. The refractive index of the liquids are shown in the adjoining diagram. The container is illuminated from the side and a small piece of glass having refractive index 1.61 is gently dropped into the liquid layer. The glass piece as it descends downwards will not be visible in
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Values of 
is :
Values of is :
Maths-General
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A rectangular tank of depth 8 meter is full of water (
), the bottom is seen at the depth
A rectangular tank of depth 8 meter is full of water (), the bottom is seen at the depth
physics-General
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A photon of energe12.75ev is completely absorbed by a hydrogen atom initially in ground sate. The principle quantum number of the excited state is:
A photon of energe12.75ev is completely absorbed by a hydrogen atom initially in ground sate. The principle quantum number of the excited state is:
chemistry-General
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A certain electronic transition from an excited statetothegroundstateoftheH2 atom in one or more steps gives rise to four lines in the ultra violet region of the spectrum, how many lines does this transition produce in the infrared region of the spectrum-
A certain electronic transition from an excited statetothegroundstateoftheH2 atom in one or more steps gives rise to four lines in the ultra violet region of the spectrum, how many lines does this transition produce in the infrared region of the spectrum-
chemistry-General
