anonymous
  • anonymous
Find the exact value of the given expression using a sum or difference formula. 1) sin345° 2) cos(11π)/12
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
1) 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
  • anonymous
2) 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
  • anonymous
OK 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))

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
Just factor out a sqrt(2) from my answer, and you should be able to find the right choice. :D
anonymous
  • anonymous
oh ok thanks
anonymous
  • anonymous
so it would be c then right?
anonymous
  • anonymous
yes
anonymous
  • anonymous
sweet! Gracias Senor!
anonymous
  • anonymous
No problem. I'd appreciate it if you fanned me. :D
anonymous
  • anonymous
Sure can do! Now your answer with three out of the same choice of answers doesn't match up though.. I don't think....
anonymous
  • anonymous
I mean with number 2....
anonymous
  • anonymous
What are your choices?
anonymous
  • anonymous
same as the choices for #1...
anonymous
  • anonymous
Factor out a sqrt(2). The answer would be d.
anonymous
  • anonymous
Ohhhh I gotcha now lol sorry about that
anonymous
  • anonymous
Haha np.

Looking for something else?

Not the answer you are looking for? Search for more explanations.