Question

How to find out the value of the lettered sides

Answer 1

Explanation:

• a

sin 46°= a/12.8

a = sin46° * 12.8 = 9.20

• b

cos59°=b/16.8

b = cos59°*16.8 = 8.65

Answer 2

a = 9.2

b = 8.65

Explanation:

First Question

To find a we use sine

sin ∅ = opposite / hypotenuse

a is the opposite

12.8 is the hypotenuse

sin 46 = a / 12.8

a = 12.8 sin 46

a = 9.2

Second question

To find b we use cosine

cos∅ = adjacent / hypotenuse

b is the adjacent

16.8 is the hypotenuse

cos 59 = b / 16.8

b = 16.8 cos 59

b = 8.65

Hope this helps you