sin
sin 225
- root of 2 over 2
cos 135
- root of 2 over 2
tan 330
- root of 3 over 3
cot 270
0
the formula of sin(x+y)
sinx*cosy+cosx*siny
cos(x-y)
cosx*cosy+sinx*siny
tan(x+y)
tanx+tany
——————
1-tanx*tany
cot(x-y)
1+tanx*tany
—————
tanx-tany
sin 75
root of 2 + root of 6
——- - - - - - -
4
cos 75
Root of 6 - root of 2
—————-
4
Tan195
2-root of 3
Cot75
2-root of 3
sin15
root of 6 - root of 2
———- —- —
4
cos(15)
Root of 6 + root of 2
————————
4
Tan(-105)
2+root of 3
Cot15
2+root of3
sin(p/12)
Root of 6 - root of 2
———————-
4
Cos(17p/12)
Root of 6 - root of 2
———————
4
Tan(p+x)=tanx
tanx=tanx
Tana=-1 and tanb=-3/4 are given.
find cot(a-b)
-7