sinx cosx = sinx + cosx - 1
2006-07-23 23:23:31 · 7 answers · asked by Smart M 2 in Science & Mathematics ➔ Mathematics
sinx cosx = sinx + cosx - 1
cnat be proved take : x =Pi then left side = 0, right side = -2
2006-07-23 23:28:57 · answer #1 · answered by gjmb1960 7 · 0⤊ 0⤋
May not be a real identity.
Solving the equation,
sinx cosx = sinx + cosx -1
tanx = tanx + 1 - 1/cosx
1/cosx = 1
cosx = 1
only true for x = 0 and x = 90 degrees
2006-07-24 06:59:20 · answer #2 · answered by ideaquest 7 · 0⤊ 0⤋
This is not true always... the question shall be like...
for what values of x the equation is valid..
The value is x=90 degrees. where sinx=1 and cosx=0
or x=0 where cosx=1 and sinx=0
2006-07-24 06:36:42 · answer #3 · answered by enrold007 1 · 0⤊ 0⤋
Uhhh.... I think you've mistyped somthing. I couldn't get it work, I was wondering why, then I realised that it was because the statement isn't true.
When I was in highschool those were my favourite type of problems. Open up your book of mathematical formulae to the trigonometry page, throw in some identities and see where you end up.
2006-07-24 06:52:13 · answer #4 · answered by tgypoi 5 · 0⤊ 0⤋
1) the equation you entered looks false for almost all x
2) how do you "prove a question" ? I only know how to prove an affirmation...
2006-07-24 06:27:42 · answer #5 · answered by Anonymous · 0⤊ 0⤋
a plus, plus a plus equals a plus squared. which makes slightly more sense than your preposition. review your question.
2006-07-24 06:36:25 · answer #6 · answered by Anonymous · 0⤊ 0⤋
something wrong in ur question....so sorry for unable to answer ur
2006-07-24 10:26:59 · answer #7 · answered by jai 2 · 0⤊ 0⤋