Post a New Question

Precalculus with Trigonometry

posted by .

Prove or disprove the following identity:

cos (x+pi/6) +sin (x-pi/3) = 0

  • Precalculus with Trigonometry -

    I will use 30° and 60° , easier to type
    cos (x+300) +sin (x-60)
    = cosxcos30 - sinxsin30 + sinxcos60 - cosxsin60
    = (√3/2)cosx - (1/2)sinx + (1/2)sinx - (√3/2)cosx
    = 0
    = RS

Answer This Question

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question