Hey 308, how's your revision going.
Not too stressed I hope XP
Here's some Math Trigo Identities and Formulas to help you... ^^
sinA = cos(90
o - A) ---------- cosA = sin(90
o - A)
tanA = cot(90
o - A) ---------- cotA = tan(90
o - A)
secA = csc(90
o - A) ---------- cscA = sec(90
o - A)
sin (-A) = -sin A
cos(-A) = cos A
tan(-A) = -tan A
sin
2 A + cos
2 A = 1
tan
2 A + 1 = sec
2 A
cot
2 A + 1 = csc
2 A
sin(A+B) = sinAcosB + cosAsinB
sin(A-B) = sinAcosB - cosAsinB
cos(A+B) = cosAcosB - sinAsinB
cos(A-B) = cosAcosB + sinAsinB
tan(A+B) = (tanA + tanB)/(1 - (tanA)(tanB))
tan(A-B) = (tanA - tanB)/(1 + (tanA)(tanB))
sin(2A) = 2sinAcosA
cos(2A) = cos
2 A - sin
2 A
cos(2A) = 2cos
2 A - 1
cos(2A) = 1 - 2sin
2 A
tan(2A) = 2tanA/(1 - tan
2 A)
sin
2 A = 1/2(1 - cos2A)
cos
2 A = 1/2(1 + cos2A)
tan
2 A = (1 - cos2A)/(1 + cos2A)
sin(3A) = 3sinA - 4sin
3 A
cos(3A) = 4cos
3 A - 3cosA
tan(3A) = (3tanA - tan
3 A)/(1 - 3tan
2 A)
Rsin(x+a) = Rsinxcosa + Rcosxsina
Rsin(x-a) = Rsinxcosa - Rcosxsina
Rcos(x+a) = Rcosxcosa - Rsinxsina
Rcos(x-a) = Rcosxcosa + Rsinxsina
Lastly, All the Best for your exams =)
AP