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Pre-Cal

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1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees =

sqrt 3 / 3 Am I correct?

2) Complete the identity

tan^2Q - 3sinQtanQsecQ =

-2tan^2Q Correct?

  • Pre-Cal -

    You are correct if your expression is
    (tan5 + tan25)/(1 - tan5tan25), which is not what you typed.

  • Pre-Cal -

    yes, to your second part

  • Pre-Cal -

    (tan5 + tan25)/(1 - tan5tan25)= tan (5+25) = tan 30 degrees = (sqrt 3)/3

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