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anonymous

  • one year ago

@Nnesha - Can you Help?: What is the exact value of tan 75 degrees? Not just answers please, explain how to do it... PLEASE HELP!!!

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  1. ganeshie8
    • one year ago
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    Hint : \(\large 75 = 30+45\)

  2. ganeshie8
    • one year ago
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    look up \(\tan(A+B)\) formula in ur notes

  3. anonymous
    • one year ago
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    ok so with the half angle formula right?

  4. anonymous
    • one year ago
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    @ganeshie8

  5. anonymous
    • one year ago
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    I get this: tan 75 = tan (150)/2 = 1 - cos(theta)/sin (theta) = 1-(-sqrt(3)/2)/(1/2) = 2 + sqrt (3)

  6. anonymous
    • one year ago
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    Looks a little weird but I think its right??

  7. Nnesha
    • one year ago
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    i would use this one \[\huge\rm tan(\color{reD}{a}+\color{blue}{b})=\frac{ \tan \color{red}{a}+ \tan \color{blue}{b} }{ 1-tan\color{reD}{a}tan\color{blue}{b} }\] sum formula for tan

  8. Nnesha
    • one year ago
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    a ,b are two numbers on the unit circle that add up to 75 degree

  9. Nnesha
    • one year ago
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    look above 't first comment by ganeshie8 30+45=75 so a=30 b=45

  10. anonymous
    • one year ago
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    got it thanks!

  11. Nnesha
    • one year ago
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    np

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