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You are not logged in. #1 20090816 16:40:09
Trigonometry ProofsHi Guys,i hope im posting in the right forum.Here Are A Few Exercises: 2) 3) 4) 5) 6) I got these out of a maths textbook #2 20090816 17:56:07
Re: Trigonometry ProofsHi Fla$h; Cross multiply and we have. Last edited by bobbym (20090816 18:04:19) In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #3 20090816 17:57:16
Re: Trigonometry ProofsHi! Jose “Make everything as simple as possible, but not simpler.”  Albert Einstein #4 20090816 18:04:50
Re: Trigonometry ProofsMost trig proofs involve converting 'tan' and 'cot' to 'sin' and 'cos', and lots of fractions! #5 20090816 18:24:00
Re: Trigonometry Proofshey i got ans for 4th ques #6 20090817 08:25:55
Re: Trigonometry ProofsHi Fla$h; Last edited by bobbym (20090817 08:26:21) In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #7 20090817 10:50:25
Re: Trigonometry ProofsHi Fla$h; Expand the LHS. Last edited by bobbym (20090817 10:56:20) In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #8 20090822 10:01:47
Re: Trigonometry ProofsHi Fla$h!; using we get Last edited by Fruityloop (20090822 10:11:56) The eclipses from Algol (an eclipsing binary star) come further apart in time when the Earth is moving away from Algol and closer together in time when the Earth is moving towards Algol, thereby proving that the speed of light is variable and that Einstein's Special Theory of Relativity is wrong. #9 20090822 12:40:11
Re: Trigonometry ProofsHi Fla$h; Now here is the proof for #3: Now cross multiply: Now substitute cos²(A) = 1 sin²(A) and clean up: Last edited by bobbym (20090822 14:12:07) In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #10 20090822 17:45:12
Re: Trigonometry ProofsHi Fla$h; Expanding the LHS and remembering that: We get: Now using: and We get: Using: Last edited by bobbym (20090822 17:48:56) In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. 