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anonymous
 5 years ago
Find the exact value of the given expression using a sum or difference formula.
1) sin345°
2) cos(11π)/12
anonymous
 5 years ago
Find the exact value of the given expression using a sum or difference formula. 1) sin345° 2) cos(11π)/12

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.01) sin(345) = sin(300+45)=sin(300)cos(45)+cos(300)sin(45)=(sqrt(3)*sqrt(2))/(2*2) + (1*sqrt(2))/(2*2)=(sqrt(6) + sqrt(2))/4

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.02) cos(11pi/12)=cos (2π/3 + π/4) = cos 2π/3 cos π/4  sin 2π/3 sin π/4 =½*(√(2)/2)  √(3)/2* (√(2)/2) = (sqrt(2)sqrt(6))/4

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0OK so I'm a little confused because my answer choices for #1 are: a.(√(3)+1)/(2√(2)) b.(√(3)1)/(2√(2)) c.(√(3)+1)/(2√(2)) d.(√(3)1)/(2√(2))

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Just factor out a sqrt(2) from my answer, and you should be able to find the right choice. :D

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so it would be c then right?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sweet! Gracias Senor!

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0No problem. I'd appreciate it if you fanned me. :D

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Sure can do! Now your answer with three out of the same choice of answers doesn't match up though.. I don't think....

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I mean with number 2....

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0What are your choices?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0same as the choices for #1...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Factor out a sqrt(2). The answer would be d.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Ohhhh I gotcha now lol sorry about that
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