2013 · Q52
The angles A, B, C, D of a quadrilateral ABCD are in the ratio 1:2:4:5. What is cos(A+B) equal to?
Elementary MathematicsTrigonometry
- A0
- B1/2
- C1
- DNone of the above
Explanation
A+B=90° → cos=0. Answer A.
The angles A, B, C, D of a quadrilateral ABCD are in the ratio 1:2:4:5. What is cos(A+B) equal to?
Explanation
A+B=90° → cos=0. Answer A.