Trigonometry

Question 1

Calculate the Area of a triangle

Answer 1

A= 1/2 * AB * Sin C

Question 2

Calculate the side
using the sin rule

Answer 2

a/ SinA = b/ sinB = c/ sinC

Question 3

Calculate the side using the cosine rule

Answer 3

a2 = b2 +c2 - 2bcCosA
After using this formula
Square root your answer

Question 4

Calculate the angle using the sin rule

Answer 4

a/SinA = b/SinB = c/ SinC

Question 5

Calculate the angle using the cosine rule

Answer 5

Cos A = b2 + c2 - a2 / 2bc

Question 6

How do we know when we need to use the Sin Rule to calculate the sides

Answer 6

A side and the angle opposite the side

Question 7

How do we know when we need to use the cosine Rule to calculate the sides

Answer 7

Two sides and the angles between the two sides

Question 8

How do we know when we need to use the Sin Rule to calculate the angle

Answer 8

A side and the angle opposite the side

Question 9

How do we know when we need to use the cosine Rule to calculate the angle

Answer 9

All three sides