Question

addition and subtraction formulas

Answer 1

@amistre64

Answer 2

i used tan(210-45) and I got \[3\sqrt{3}-9/3\sqrt{3}+9\]

Answer 3

but it is wrong

Answer 4

@UnkleRhaukus

Answer 5

\[\boxed{\tan(u\pm v)=\frac{\tan u\pm \tan v}{1\mp\tan u\tan v}}\]

\[\tan(210°- 45°)=\frac{\tan 210°- \tan 45°}{1+\tan 210°\tan 45°}\]

Answer 6

yes i did that and got