Page 93 - Math SL HB Sem 1

CIRCULAR I..UNCTIoNS AN D TITIGONoMF]TITY

'I.he fourth quadrant

If 0o<r<90o or 0<e<1
2
sin (360 - d)u = si, (2tr -0) sin (-d) -

:
cos(- d )

cos(360 - 0)" = cos(2r- 0)
tan(-0) =

tan(360 - 0)'= tan(2z-0)

4-9