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anonymous

  • one year ago

Evaluate the expression without using a calculator. sin pi/6 + cos pi/6 I'm so lost on how to do this :/

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  1. anonymous
    • one year ago
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    sin pi/6 +cos pi/6 this is same as sin 30 + cos 30

  2. dumbcow
    • one year ago
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    unit circle https://en.wikipedia.org/wiki/Unit_circle#/media/File:Unit_circle_angles_color.svg (cos,sin)

  3. anonymous
    • one year ago
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    because pi=180

  4. anonymous
    • one year ago
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    Oh okay I understand now. Thanks

  5. anonymous
    • one year ago
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    sin30= 1/2 and cos 30= \[\sqrt{3/2}\]

  6. anonymous
    • one year ago
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    now solve \[1/2 +\sqrt{3/2}\]

  7. anonymous
    • one year ago
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    It says in the back of the book that its \[1+\sqrt{3}/2\] but idk understand how they got the radical

  8. dumbcow
    • one year ago
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    from the unit circle

  9. anonymous
    • one year ago
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    so, 1+\[\sqrt{3}/2\] is the answer

  10. anonymous
    • one year ago
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    Oh I kind of see

  11. anonymous
    • one year ago
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    nevermind I do see now

  12. anonymous
    • one year ago
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    its just simple.since they have same denominator, you just add the numerators

  13. anonymous
    • one year ago
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    solve, 1/2+1/2= ?

  14. anonymous
    • one year ago
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    1

  15. anonymous
    • one year ago
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    very correct. now you understand

  16. anonymous
    • one year ago
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    thats all

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spraguer (Moderator)
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