Page 108 - Math SL HB Sem 1

CIRCULAR FUNCTIONS AND'I'IIIGONOMI]TRY

IIALF ANGLE IDENTITIES

AA
sin A lstn - cos -
22

A
cosA : 2cos2 j -l

| -2sin2 4
2
,1 .,4
cos'- - sln'-
22

2hn4
tanA: 2
l-tan'4
2

4-29