ABCD Is a cyclic quadrilateral then cos A+cos B+ cosC+ cosD =?
Answers
Answered by
4
= 0.
A+C = 180°. C = 180°- A. Hence cosC = - cosA.
B+D = 180°. D = 180°- B. Hence cosD = - cosB.
Now, add ; get result zero
A+C = 180°. C = 180°- A. Hence cosC = - cosA.
B+D = 180°. D = 180°- B. Hence cosD = - cosB.
Now, add ; get result zero
Similar questions