If sin theta=3/5 and theta is in quad 2 the exact form of cos (5pi/3-theta) is .....?
I just need help with it I can do the work but a little help could help lol

Question

If sin theta=3/5 and theta is in quad 2 the exact form of cos (5pi/3-theta) is .....?
I just need help with it I can do the work but a little help could help lol

0_0youscareme · Answer

https://answers.yahoo.com/question/index?qid=20100719180410AAc49St

anonymous · Answer

o.O thats not the same question

anonymous · Answer

Yeah I know for sure thats not the right answer lol

anonymous · Answer

Use the compound angle formula for cos,

0_0youscareme · Answer

i put the link there bcuz that he just put copy and paste

anonymous · Answer

this thing is refusing to let me use the equation tool...

cos(A-B)=cosAcosB+sinAsinB

0_0youscareme · Answer

i never said it had the answer

anonymous · Answer

Nono lol I was talking about jacob

0_0youscareme · Answer

yeah but i put the link were he copy and pasted the answer some1 else put

anonymous · Answer

I got the answer 3sqrt3-4/10 but thats the same answer as another problem I did

anonymous · Answer

he deleted it i think... XD

anonymous · Answer

$$\sin \Theta=\frac{ 5 }{ 3 }$$ $$\cos \theta=\frac{ 4 }{ 5 }$$ $$\cos (\frac{ 5\pi }{ 3 }-\theta)=\cos \frac{ 5\pi }{ 3 } \cos \theta + \sin$$

anonymous · Answer

oops incomplete... k im not used to this equation tool.
meant to be sin5pi/3sin(theta)

anonymous · Answer

@zepdrix Do you have any idea of how this is done? I think my work is correct

anonymous · Answer

$$=\frac{ 1 }{ 2 }\frac{ 4 }{ 5 }+(-\frac{ \sqrt{3} }{ 4 })\frac{ 3 }{ 5 }$$

anonymous · Answer

I think I got it now after doing it

anonymous · Answer

But the way you were doing it was a little wrong lol