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sabika13

  • 3 years ago

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?

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  1. LoveUu
    • 3 years ago
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  2. LoveUu
    • 3 years ago
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    @sabika13

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

  4. sabika13
    • 3 years ago
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    i dont understand.. can you do it step by step

  5. LoveUu
    • 3 years ago
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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}

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

  7. sabika13
    • 3 years ago
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    the trig identities chart*

  8. LoveUu
    • 3 years ago
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    is it ok?now or not?

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

  10. LoveUu
    • 3 years ago
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    which grade r u in?

  11. sabika13
    • 3 years ago
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    122

  12. sabika13
    • 3 years ago
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    sorry 12*

  13. LoveUu
    • 3 years ago
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    o Zbrdst

  14. sabika13
    • 3 years ago
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    thank u for yourhelp.

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