Question

Find , without using mathematical table, the value of : (cos 75 + cos 15) / (cos75 - cos 15)

Answer 1

Answer:

if you get the answer please send me ok

there is another way to solve but i dont know.sorry

Answer 2

Step-by-step explanation:

$\frac{ \cos(75) + \cos(15) }{ \cos(75) - \cos(15) }$

$= \frac{ \cos(75 + 15) }{\cos(75 - 15) }$

$= \frac{ \cos(90) }{ \cos(60) }$

$therefore \: \cos(90) = 0$

$and \: anything \: upon \: 0 \: is \: 0$

So the value is zero