Quiz 4:積化和差
函數 \(\sin {37.5^ \circ }\cos {7.5^ \circ }\) 之值
\(\frac{{\sqrt 6 + \sqrt 2 }}{4}\)
\(\frac{{\sqrt 3 + \sqrt 2 }}{2}\)
\(\frac{{\sqrt 2 + 1}}{4}\)
\(\frac{{\sqrt 3 + \sqrt 2 }}{4}\)