SOLUTION: what is the sum or difference identity for the follow: sin 165

Question 369999: what is the sum or difference identity for the follow:
sin 165

Answer by jsmallt9(3759) (Show Source): You can put this solution on YOUR website!
With the 5 at the end of 165, you should be thinking that a multiple of 45 would be involved (because all the other special angles end in 0). Here are several possibilities:
sin(165) = sin(120+45) = sin(120)*cos(45) + sin(45)*cos(120)
sin(165) = sin(135+30) = sin(135)*cos(30) + sin(30)*cos(135)
sin(165) = sin(210-45) = sin(210)*cos(45) - sin(45)*cos(210)
RELATED QUESTIONS
What is the sum or difference of this: sin 165^degrees (answered by ikleyn)

Find the exact value using a sum or difference identity. cos(165�) (answered by stanbon)

Use the sum or difference identities to find the exact value of sin -165... (answered by lwsshak3)

Find the exact value by using a sum or difference identity. sin... (answered by Edwin McCravy,htmentor)

Use a sum or difference identity to find the exact value for the sine, cosine and tangent (answered by CubeyThePenguin)

Can you find the answer to sin (21pi/12) using sum and difference... (answered by ikleyn)

which sum or difference identity would you use to verify that sin(180 + theta) =... (answered by fractalier)

Use sum or difference identities to find the exact value of each trigonometric function. (answered by stanbon)

Find the Exact value (No Decimals) of sin(105 degrees) using the sum or difference... (answered by Theo)