Trigonometry

Question 1

Pythagorean theorem

Answer 1

c^2 = a^2 + b^2

Question 2

Sine law

Answer 2

(a/sinA) = (b/sinB) = (c/sinC)

Question 3

Cosine law

Answer 3

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

Question 4

Law of tangent

Answer 4

(a-b)/(a+b) = (tan((A-B)/2))/(tan((A+B)/2))