Trig formula Flashcards
1
Q
Cosine rule
A
c^2 = a^2 + b^2 - 2ab cos(C)
2
Q
Sine rule
A
a/ sin(A) = b/sin(B) = c/sin(C)
3
Q
area of a triangle in trig
A
Area = 1/2 bc sin(A)
4
Q
Pythagorean identity
A
sin^2 (A) + cos^2 (A) = 1
5
Q
SOHCAHTOA is…
A
sinθ = O/H
cosθ = A/H
tanθ = O/A
tanθ = sinθ/cosθ = m = gradient
6
Q
A
