SOLUTION: Find the exact value:
Sin(Pi/18)cos(5Pi/18)+cos(Pi/18)sin(5Pi/18)
i know its the sin addition formula but I'm lost on how to break this down into it. Can anyone help?
Algebra.Com
Question 422130: Find the exact value:
Sin(Pi/18)cos(5Pi/18)+cos(Pi/18)sin(5Pi/18)
i know its the sin addition formula but I'm lost on how to break this down into it. Can anyone help?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Sin(Pi/18)cos(5Pi/18)+cos(Pi/18)sin(5Pi/18)
=sin(pi/18+5Pi/18)
=sin(6pi/18)
=sin(pi/3)=sqrt(3)/2
RELATED QUESTIONS
find the quotient 3(cos 5pi/12 + i sin 5pi/12) divided by 6(cos pi/12 + i sin... (answered by jim_thompson5910)
How do i find the exact value of the product
cos[5pi/24]... (answered by lwsshak3)
Use an Addition or Subtraction Formula to write the expression as a trigonometric... (answered by Alan3354)
Use an Addition or Subtraction Formula to write the expression as a trigonometric... (answered by lwsshak3)
Given that z_1 =
4[cos (pi/3) + i sin (pi/3)] and z_2 = 2[cos (5pi/6) + i sin (5pi/6)]
(answered by ikleyn)
Use a sum or difference formula to find the exact value of the following.... (answered by lwsshak3)
use sum or difference formula to find exact value of the following:... (answered by Edwin McCravy)
Using Trigonometry Identities. Simplify the expression into one trigonometric function... (answered by solver91311,tokeins,ikleyn,MathTherapy)
Find the exact value of cos(pi) cos(3pi/4) + sin(pi) sin... (answered by jim_thompson5910,MathTherapy)