If α,β and γ are conected by the relation
2tan^2 α tan^2 β tan^2 γ+tan^2 α tan^2 β +
tan^2 β tan^2 γ+tan^2 γ tan^2 α=1 then
which of these are correct(multi correct)
(A)sin^2 α+sin^2 β+ sin^2 γ=1
(B)cos^2 α+cos^2 β+cos^2 γ=2
(C)cos2α+ cos2β+ cos2γ=1
(D)cos(α+β) cos(α−β)= cos^2 γ
Assuming that the moon′s diameter
subtends and angle (1/2)° at the eye
of an observer, find how far from the
eye of a coin of 10 cm diameter must
be held so as just to hide moon ?
A particle of mass m moving with a
speed v hits elastically another
stationary particle of mass 2m on a
smooth horizontal circular tube of
radius r. The time in which the next
collision will take place is equal to
A uniform circular disc of mass 1.5 kg
and radius 0.5 m is initially at rest on a
horizontal frictionless surface. Three
forces of equal magnitude F = 0.5 N
are applied simultaneously along the
three sides of an equilateral triangle
xyz with its vertices on the perimeter
of the disc. One second after applying
the forces, the angular speed of the disc
in rad/s is :
About a collision which of
the following are not correct
a. Physical touch is a must
b. Particles cannot change
c. Effect of external force is not considered
d. Momentum may or may not change
multi−correct question
A particle of mass m is fixed to one end
of a light rigid rod of length l and rotated
in a vertical circular path about its
other end. The minimum speed of the
particle at its highest point must be
If three positive numbers a, b, c are in
A.P. and (1/a^2 ), (1/b^2 ), (1/c^2 ) also in A.P., then
(1) a = b = c
(2) 2b = 3a + c
(3) b^2 = ((ac)/8)
(4) 2c = 2b + a