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
- Ed ILv 79 years agoFavorite 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
- Anonymous9 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.