Answer:
cos B =

tan B =

Explanation:
- cos Θ = adjacent / hypotenuse
- sin Θ = opposite / hypotenuse
- tan Θ = opposite / adjacent
11) cos B
- the adjacent leg is 15
- the hypotenuse is 39
since cos Θ = adjacent / hypotenuse
then cos B =

dividing both the numerator and denominator by 3 in order to simplify the answer
cos B =

For the other picture
- the adjacent leg is 9
- the hypotenuse is 41
since cos Θ = adjacent / hypotenuse
then cos B =

21) tan B
- the opposite leg is 40
- the adjacent leg is 9
since tan Θ = opposite / adjacent
then tan B =

For the other picture
- the opposite leg is 36
- the adjacent leg is 15
since tan Θ = opposite / adjacent
then tan B =

simplifying (diving numerator and denominator by 3)
tan B =
