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sabika13

Given that sin pie/6 = 1/2, use an equivalent trigonometric expression to show that cos= 1/2. I have no clue how to do this, can someone help me?

  • one year ago
  • one year ago

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  1. LoveUu
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    • one year ago
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    @sabika13

    • one year ago
  3. LoveUu
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    sin 30*=1/2 cos60*=1/2 u can see trignometric table for this and all for all values also

    • one year ago
  4. sabika13
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    i dont understand.. can you do it step by step

    • one year ago
  5. LoveUu
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    If cos x = 1/2 then x = cos^(-1) (1/2) therefore, x = 60 degrees , 300 degrees {where x is greater than or equal to 0 and lesser than or equal to 360} or pi/3 radians, 5pi/3 radians {where x is greater than or equal to 0 and lesser than or equal to 2pi}

    • one year ago
  6. sabika13
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    okay.. so we do not need to use trigonometric identities?

    • one year ago
  7. sabika13
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    the trig identities chart*

    • one year ago
  8. LoveUu
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    is it ok?now or not?

    • one year ago
  9. sabika13
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    i think its okay.. i basically just solve sinx and cosx?

    • one year ago
  10. LoveUu
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    which grade r u in?

    • one year ago
  11. sabika13
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    122

    • one year ago
  12. sabika13
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    sorry 12*

    • one year ago
  13. LoveUu
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    o Zbrdst

    • one year ago
  14. sabika13
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    thank u for yourhelp.

    • one year ago
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