1 asked in Education & ReferenceHomework Help · 10 years ago

sin....cosine.....very short!!! please open!!?

Prove each identity: ( btw: this lesson is about sin, cosin, tan...etc)

sin x + sin x cot^2 x = csc x all the x's are letters not 'times'

my answer: csc x

2 Answers

  • Ed I
    Lv 7
    10 years ago
    Favorite Answer

    LHS: sin x + sin x cot^2 x = sin x + sin x • cos^2 x/sin^2 x = sin x + cos^2 x/sin x = (sin^2 x + cos^2 x)/sin x = 1/sin x = csc x

  • Anonymous
    10 years ago

    what you have as your answer is not what the problem is looking for.

    the problem is asking you to show your work on PROVING that: sinx + (sinx)(cot^2x) = cscx

    to do this, just look at the list of trigonometric identities which you can find on the web OR your MATH TEXT BOOK.

Still have questions? Get your answers by asking now.