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Babynini
 one year ago
Find the exact value of
sin(pi/12)
using the Addition/Sub formulas
Babynini
 one year ago
Find the exact value of sin(pi/12) using the Addition/Sub formulas

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jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2hint: \[\Large \sin\left(\frac{\pi}{12}\right) = \sin\left(\frac{\pi}{3}  \frac{\pi}{4}\right)\] then use the identity sin(xy) = sin(x)*cos(y)  cos(x)*sin(y)

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2alternatively, you can use the fact that \[\Large \sin\left(\frac{\pi}{12}\right) = \sin\left(\frac{1}{2}*\frac{\pi}{6}\right)\] and use the half angle identity for sine. But it looks like they want you to use the first method

Babynini
 one year ago
Best ResponseYou've already chosen the best response.0ooh thanks! Yes, I got the 1/2 * pi/6 but couldn't figure that out with the addition/subtraction and had forgotten about the half angle identity. Thanks! :)

Babynini
 one year ago
Best ResponseYou've already chosen the best response.0(sorry for taking long to respond, I was having dinner and forgot)
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