Cho tam giác ABC vuông tại A biết cos B =4/5 hãy tính các tỉ lượng giác của góc C

the answer is: -22 also a

hope i

-lavira: )

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.

2*2=3

two times two is four

i dont understand what you mean so pls comment