VERY EASY QUESTION I CANT FIGURE OUT!

[cockchestner007]

If tan =1/3 and ?<?<3?/2 find the exact value of the following:?


(a) sin(?/3-?)

 

[takariendire]

Hi,

I created a video recording of an answer :

http://www.blueteach.com/v/HLKRM9L492f1JfEn0a

You might want to check the numbers, but the reasonning should be correct.

cheers !

 

[Deleted member 4993]

If tan(what?) =1/3 and ?<?<3?/2 find the exact value of the following:?


(a) sin(?/3-?)

 

[Deleted member 4993]

If tan(what?) =1/3 and ?<?<3?/2 find the exact value of the following:?


(a) sin(?/3-?)

Hint:

If

tan(?) = x = x/1

then

sin(?) = -x/?(x[sup:ehz5n977]2[/sup:ehz5n977] + 1)

and

cos(?) = -1/?(x[sup:ehz5n977]2[/sup:ehz5n977] + 1)

and

sin(A+B) = sin(A)*cos(B) + cos(A)*sin(B)