top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration Why to Join

    Get Free Puzzle Updates

Facebook Login
Site Registration

What is the distance between the points (a cos 25, 0) and (0, a cos 65)?

0 votes
599 views
What is the distance between the points (a cos 25, 0) and (0, a cos 65)?
posted Mar 2, 2016 by anonymous

Share this puzzle
Facebook Share Button Twitter Share Button Google+ Share Button LinkedIn Share Button Multiple Social Share Button

1 Answer

+1 vote
Just apply the distance formula for points (a cos⁡〖25°,0〗 ) and (0,a cos⁡〖65°〗 )

= √([(a Cos25-0)^2+(0-a COs65)^2 ] )
= √([a^2 Cos^2 25+a^2 Cos^2 65] )

(When we take a^2 and taking it out of the root, it will give a)

a×√((Cos^2 25+Cos^2 65) )

(We know that by complimentary angles, Cos25=Sin65, SimilarlyCos^2 25=Sin^2 65)
a×√((Sin^2 65+Cos^2 65) )
(We know thatSin^2 X+Cos^2 X=1)
a×√((1) )
√1=1
a×1=a

answer Jun 22, 2016 by anonymous



Similar Puzzles
0 votes

What is the range of the values of k such that
k Cos A - 3 Sin A = k + 1

has a real solution?

0 votes

If in a triangle ABC:
Cos A + Cos B + Cos C = 3/2
then what is so special about this triangle?

0 votes

If
P=Sin A.Sin B,
Q= Sin C.Cos A,
R = Sin A.Cos B and
S=Cos A.Cos C
then
5(P^2+Q^2+R^2+S^2) = ??

+1 vote

What would be the value of Sin(50 + A) - Cos(40 - A), share your working also?

Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...