How do you factor a^3 [plus/minus] b^3?

QUESTION 2:

What are the 16 standard angles for Trigonometry?

[I need to know because I'm trying to memorize all the fundamentals for Calculus], please help.

Comments

  • a^3+-b^3= (a+-b)(a^2-+ab+b^2)

    16 angles would be 0,30,45,60,90 and add 90 to each of these until you get 270,300,315,330,360

  • sum of cubes and difference of cubes

    a^3 + b^3 = (a + b)(a^2 - ab + b^2)

    a^3 - b^3 = (a - b)(a^2 + ab + b^2)

    The thing to remember is the SOAP method

    Same

    Opposite

    Always Positive

    This gives the signs to use

    a^3 + b^3 = (a +(same) b)(a^2 -(opposite) ab +(always positive) b^2)

    a^3 - b^3 = (a -(same) b)(a^2 +(opposite) ab +(always positive) b^2)

  • a^3+b^3 = (a+b)(a^2-ab+b^2)

    a^3-b^3 = (a-b)(a^2+ab+b^2)

  • Sum/difference of cubes:

    a³ ± b³ = (a ± b)(a² ∓ ab + b²)

    For the second look at any, literally any, "unit circle." <- Google that

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