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huneya

  • 3 years ago

find the exact value of the indicated trigonometric function of theta cosθ=4/7,tanθ<0 fin sin theta

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  1. rizwan_uet
    • 3 years ago
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    |dw:1360331199543:dw|

  2. ParthKohli
    • 3 years ago
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    @Opcode

  3. mathsmind
    • 3 years ago
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    you find the lengths of the triangle using pyth. theorem

  4. mathsmind
    • 3 years ago
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    then use the principle of sin(theta)=opp/hype, and tan(theta)= sin.cos or =opp/dj

  5. huneya
    • 3 years ago
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    |dw:1360331698436:dw|

  6. mathsmind
    • 3 years ago
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    tan(theta)=sin(theta)/cos(theta)

  7. huneya
    • 3 years ago
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    cos is adj/hype

  8. rizwan_uet
    • 3 years ago
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    but here tan theta is not less than 0(zero)

  9. mathsmind
    • 3 years ago
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    yes exactly @huneya

  10. mathsmind
    • 3 years ago
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    sin(theta)=opp/hype

  11. mathsmind
    • 3 years ago
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    tan(theta)=opp/adj

  12. rizwan_uet
    • 3 years ago
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    recheck your question

  13. mathsmind
    • 3 years ago
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    yes @rizwan has a point tan(theta) is not less than zero

  14. mathsmind
    • 3 years ago
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    that condition confused me as well

  15. mathsmind
    • 3 years ago
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    or its an error by the book or ur teacher

  16. mathsmind
    • 3 years ago
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    you can use another method to solve this

  17. mathsmind
    • 3 years ago
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    \[\sin^2(\theta) = 1 - \cos^2(\theta)\]

  18. mathsmind
    • 3 years ago
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    =1-(4/7)^2

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