Trigonometry rules Sunday, 28 July 2019

The General Triangle C B A

The General Triangle a C B A

The General Triangle a C B b A

The General Triangle a C B c b A

The Sine Rule A B C c a b

Example Find 𝑎 in the triangle below a 8 cm 27 110

Find c in the triangle below Example Find c in the triangle below c 7 cm 60 50

First we must find this angle using angles in a triangle angle = 86⁰ Example Find 𝑥 in the triangle below x 10.6 cm 54 40 First we must find this angle using angles in a triangle angle = 86⁰

Example Find 𝑏 in the triangle below 84 12 cm 63 33 b

Find the size of angle B in the triangle below Example Find the size of angle B in the triangle below 15cm 120 A B C 6cm Similar to the previous question the information provided only allows us to find angle C first

Find the size of angle A in the triangle below Example Find the size of angle A in the triangle below 24cm 70 A B C 27cm

Find the size of angle R in the triangle below Example Find the size of angle R in the triangle below 18.5cm 85 Q P R 10.5cm