sin57°＝sin(90°－33°)＝cos33°
cos65°＝cos(90°－25°)＝sin25°
tan67°＝tan(90°－23°)＝1/tan23°
sin150°＝sin30°＝1/2
cos150°＝－cos30°＝－√3/2
tan150°＝(1/2)/(－√3/2)＝－1/√3
OP＝√(16＋25)＝√41
sinθ＝4/√41
cosθ＝－5/√41
tanθ＝－4/5
sin133°＝sin47°＝0.7314
cos146°＝－cos34°＝－0.8290
tan152°＝－tan28°＝－0.5317
