Answer:
b. -36/77
Step-by-step explanation:
As 0 < x <
/2 => tan x > 0
As 0< y <
/2 => tan y > 0
We have the formula:
As tan x = 1/(cotx) => ![tan^{2}x = \frac{1}{cot^{2}x} =\frac{1}{225/64} = \frac{64}{225}](https://tex.z-dn.net/?f=tan%5E%7B2%7Dx%20%3D%20%5Cfrac%7B1%7D%7Bcot%5E%7B2%7Dx%7D%20%3D%5Cfrac%7B1%7D%7B225%2F64%7D%20%3D%20%5Cfrac%7B64%7D%7B225%7D)
As tan x > 0 => tan x = 8/15
As tan y > 0 => tan y = 4/3
As tan (x-y)=
Answer:
3.92$
Step-by-step explanation:
60 / 2 = 30
30 * 5 = 150
he had $150 at first
60, the amount he was left with was 2/5 or 40% of his original amount