Math, asked by sashibhusansundaray, 11 months ago

ABCD is a quadrilateral .
What is the value of Cos1/2(A+C) + Cos1/2(B+D) ?

Answers

Answered by surendrasahoo
4

Answer:

Let ABCD be the quad.

So,A+B+C+D=360 degree (angle sum property of a quad.)

Now,cos1/2(A+C)+cos1/2(B+D)

=cos1/2(A+C+B+D)

=cos1/2×360

=cos180

=(cos90)2

=0×2

=0(answer).

Similar questions