Equations And Formulae

Question 1

Basic trig

Answer 1

Soh cah toa
Sin = opposite/hypotenuse
Cos= adjacent /hypotenuse
Tan= opposite/adjacent

Question 2

Cosine rule

Answer 2

Capital letter = Angle lower case letter= opposite side

a^2 = b^2 + c^2 - (2xbxcxCos(A))

Question 3

Sine rule

Answer 3

Capital letter = Angle lower case letter= opposite side
(Sin A/a)=(SinB/b)=(Sin C/c)
Rearranged to
(a/Sin A)=(b/Sin B)=(c/Sin C)

Question 4

Area of non right angle triangle

Answer 4

Capital letter = Angle lower case letter= opposite side

1/2 ab sin(C)

Question 5

Volume of pyramid

Answer 5

1/3x base x height

Question 6

Quadratic formula

Answer 6

-b ± Root(b^2-4ac)
———————————-
2a