Math Formulas

Question 1

Cosine Rule

Answer 1

C²= a² + b² -2abcosC

Question 2

Vector Dot Product (no angle)

Answer 2

v * w = v_x* w_x + v_y* w_y

Question 3

Vector Dot Product (with angle)

Answer 3

w * v = |w||v|cos°

Question 4

Vector Addition

Answer 4

c_x = a_x + b_x
c_y = a_y + b_y

Question 5

Quotient Rule

Answer 5

If f(x) = u(x)/v(x)
Then, f’(x) = v* u’ - u* v’ / v²

Question 6

Sin Rule

Answer 6

sinA/ a = sinB/ b = sinC/ c