sin23°+sin27°\sin23\degree+\sin27\degreesin23°+sin27° dapat ditulis menjadi ....
2sin50°cos4°2\sin50\degree\cos4\degree2sin50°cos4°
2sin25°cos2°2\sin25\degree\cos2\degree2sin25°cos2°
2sin23°sin27°2\sin23\degree\sin27\degree2sin23°sin27°
2cos23°cos27°2\cos23\degree\cos27\degree2cos23°cos27°
2cos50°cos4°2\cos50\degree\cos4\degree2cos50°cos4°