常用三角函数值对照表

sin0=sin0°=0

cos0=cos0°=1

tan0=tan0°=0sin15=0.650

sin15°=0.259

cos15=-0.759cos15°=0.966

tan15=-0.855tan15°=0.268

sin30°=1/2

cos30°=0.866

tan30°=0.577

sin45°=0.707

cos45°=0.707

tan45=1.620tan45°=1