Page 92 - Math SL HB Sem 1

CIRCUI,AR FUNCTIONS AND TRIGONOME'IRY

Use your results to complete:

lf 0o<, <90" or O<e<71
2'
sin (180 - 0)'-- sin (r -0)

cos(I80 - 0)' : cos(z-0)

tan(180 - 0)'- tan(tr-0)

The third quadrant (reflex angles)

Using the unit circle, we have:

sin225": sin .-... . (in radians)
:
sin 45o sin. .. .. ..

cos 225o = cos..... . (in radians)

cos 45o = cos....-..

Use your results to complete:
Il 0o< B <90o or O. e .:
2'
sin (180 + 0)o: sin (r+0)

cos(180 + 0)' : cos(r+0)

:
tan(180 a 0)o tan(1r+0)

4-8