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You are not logged in. #1 20130607 18:22:48
Trigonometry ProblemHi, guys Thanks Debjit Roy ___________________________________________________ The essence of mathematics lies in its freedom  Georg Cantor #2 20130607 20:22:39
Re: Trigonometry Problemhi debjit625 So where did the sinxcosx term go ? You could try this: and so get an expression for cos(x  y) where cos(y) = 6/10 ..... This enables you to work out values for a and b and hence sin(a+b). I'm getting I feel as though a solution should be possible without evaluating the angles and thus giving 'absolute' accuracy but I cannot find it yet. Still thinking about this. Bob ps. Diagram was for a failed solution, but I cannot delete it at the moment. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #3 20130607 23:09:48
Re: Trigonometry ProblemHis quadratic is correct. Use cos(x)=sqrt(1(sin(x))^2). The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #4 20130608 00:55:33
Re: Trigonometry ProblemSorry for late reply... The answer in the book is sin(a + b) = 24/25 as bob got 0.96,@Bob but I didn't understood what you did... can you explain and why my equation is not working Last edited by debjit625 (20130608 01:48:18) Debjit Roy ___________________________________________________ The essence of mathematics lies in its freedom  Georg Cantor #7 20130608 01:49:59
Re: Trigonometry Problem24/25 is the exact answer. We can use the roots of that quadratic. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #9 20130608 02:22:37
Re: Trigonometry ProblemHi Bob One is sin(a), the other is sin(b). Now calculate cos(a) and cos(b) from those and use the sine of angle sum formula. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #10 20130608 03:28:48
Re: Trigonometry Problemhi Stefy, You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #11 20130608 03:32:38
Re: Trigonometry ProblemYes dude it make sense now ,I tried to solve and after coming to this point I gave up Thanks anonimnystefy and Bob for the help... Debjit Roy ___________________________________________________ The essence of mathematics lies in its freedom  Georg Cantor #12 20130608 04:11:13
Re: Trigonometry Problem
That looks ok to me. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei 