Felicia invested money at an interest rate of 4%. After six months, she had earned $90.00 interest. How much money did Felicia i
2 answers:
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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) =>
As tan x > 0 => tan x = 8/15
=>
=>
As tan y > 0 => tan y = 4/3
As tan (x-y)=