Teaching AP DSC School Assistant 2025 Mock Test Series Mathematics Trigonometry Multiple and Sub-multiple Angles
In a triangle \(\cos \left(\frac{A+B}{2}\right)=\ldots\)
1
\(\cos \frac{c}{2}\)
2
\(-\sin \frac{c}{2}\)
3
\(\cos \left(\frac{A-B}{2}\right)\)
4
\(\sin \frac{c}{2}\)