The line y=mx+c touches
ellipse (x^2 /a^2 )+(y^2 /b^2 )=1
prove that the foot of
perpendicular from
focus into this line lie on
auxillary circle
x^2 +y^2 =a^2
A man walking due to west along a level road observes a school in a direction N 72° E. After walking 1500 yards,
he observes it in a direction N 67° E. How far is the school from the road.
^• 739 is a prime number and
its reversed number 937 is also
prime.
Determine 4-digit prime numbers
whose reversed be also prime.
^• If number of such primes is a
function of number of digits,
determine that the function is
increasing or not.
For ellipse
16x^2 +4y^2 +96x−8y−84=0
find
i)centre
ii)verteces
iii)focus
iv)directrix
v)length of major
and minor axis
vi)ecentricity
vii)graph the ellipse