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Find exact value of cos(13pi/6)

  1. find exact value cos(13pi/15)cos(-pi/5)-sin(13pi/15)sin(-pi/5)
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    2. chris asked by chris
    3. views icon 1,183 views
  2. How do you find the exact value of Sin(13pi)?
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    2. George asked by George
    3. views icon 2,040 views
  3. Find exact value of cos(13pi/6)
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  4. Find the exact value of Sin^-1(sin(13pi/15))
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    2. Kelly asked by Kelly
    3. views icon 940 views
  5. Find the exact value of the following trigonometric functions:sin(13pi), cos(14pi), tan(15pi)
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    2. Greg asked by Greg
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  6. use a sum or difference formula to find the exact of the trigonometric functioncos(-13pi/12)
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    2. lina asked by lina
    3. views icon 854 views
  7. Find the linear approximation L(x)of the function f(x)=cos(pi/(6)x) at the point x=1 and use it to estimate the value of
    1. answers icon 1 answer
    2. Amy asked by Amy
    3. views icon 677 views
  8. what is the exact value of tan- 13pi/6
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    2. Anonymous asked by Anonymous
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  9. determine an exact expression for the trigonometric function sin(13pi/12).
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    2. jj re asked by jj re
    3. views icon 2,178 views
  10. If cos(a)=1/2 and sin(b)=2/3, find sin(a+b), if1) Both angles are acute; Answer: (sqrt(15)+2)/6 ii) a is an acute angle and pi/2
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    2. Brandi asked by Brandi
    3. views icon 588 views