If x is an acute angle and tan x = 3/4

Question

Evaluate : cos x - sin x
cos x + sin x

Answer 1

tanx = 3/4
draw the triangle, and you can see that the hypotenuse is 5, so
sinx = 3/5
cosx = 4/5
Now just use those values in your expression.

Answer 2

Word~bard

Answer 3

Help me to work it out

I don't understand