Trigonometry - Topic 11

Question 1

Sohcahtoa?

Answer 1

Sine ratio = o/h Cosine ratio = a/h Tangent ratio = o/a

Question 2

Which side is the hypotenuse Which side is the opposite Which side is the adjacent

Answer 2

The hypotenuse is the longest side, diagonal The opposite is the side opposite the angle The adjacent is the side beside the angle

Question 3

Answer 3

sin 60° = o/h

sin 60° = x/3.2

x = 3.2 x sin 60°

x = 2.77c,

Question 4

Answer 4

sin x = o/h

sin x = 4/8

x = sin-1 (4/8)

x = 30°

Question 5

Answer 5

sin 40° = o/h

sin 40° = 15/x

x sin 40° = 15

x = 15/sin 40°

x = 23.34cm