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Questions in Math tagged with "Trigonometry"

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  when SIN (2x) + (SIN x)^2 = 0, how can I find x between 0 and 2pi? 

  Posted by wilcop on Nov 17, 2009 at 10:33 AM

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  when 3 (tan x)^2 + 4 (sin x)^2 = 0, what is x between 0 and 2pi? 

  Posted by jamesbad on Nov 17, 2009 at 07:52 AM

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  If 2*cosx*cos(3x)+1=0, what can x be between 0 and 2pi?

  Posted by tanjag on Nov 17, 2009 at 04:51 AM

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  If cos x * (cos 4x) = sin x * sin (6x), what is x between 0 and 2pi?

  Posted by kaaskop on Nov 17, 2009 at 03:30 AM

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  If cos x + cos (3x) + cos (5x) = 0, what can x be between 0 and 2pi?

  Posted by fcstrooper on Nov 16, 2009 at 11:55 PM

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  Given: cos x + cos (3x) + cos (5x). what is x?

  Posted by kooskuin on Nov 16, 2009 at 01:22 PM

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  Given is sin (2x) + (sin x)^2= 0, what is x?

  Posted by henkien on Nov 16, 2009 at 12:53 PM

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  Given is (1 - sin x) * tan x = sin x     find all values for x between 0 and 2π

  Posted by tooliebol on Nov 16, 2009 at 11:04 AM

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  Given that sin (x-(1/4 * π) * cos x = (1/2*(2^0,5)  ) * (sin x)^2 find all values for x between 0 and 2π

  Posted by diedep on Nov 16, 2009 at 10:48 AM

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  Given that sin^4(x) + cos^4(x) = 1, find all values for x between 0 and 2π

  Posted by wilcop on Nov 16, 2009 at 09:55 AM

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  Story problem from pre-calc.

  Posted by lindsey0 on Nov 12, 2009 at 05:54 PM

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  Arctg(x) + Arcctg(1/3) = Pi/2. Find the x value.

  Posted by lostgirl on Oct 3, 2009 at 05:31 AM

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  Given sin=3\5andcos=4\5 find tan.

  Posted by joshua1979 on Aug 17, 2009 at 04:23 PM

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  Find out if the equality is true: sin x + sin (3x) + sin (5x)=(1+2cos 2x)sin 3x

  Posted by ggenius on Apr 22, 2009 at 06:53 AM

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  Find out the solutions of the equation sin 2x = 2 sin x, in the interval (0,2pi).

  Posted by greenturtle on Apr 17, 2009 at 09:36 AM

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  I need 2 methods, at least, to solve this issue: sin 15 + sin 75=?

  Posted by nena1993 on Apr 17, 2009 at 09:31 AM

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  Prove that sin 6<0!

  Posted by galbenusa on Apr 6, 2009 at 05:55 AM

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  Calculate the expression:  sin pi/6 -cos pi/3

  Posted by jeuxdesfou on Mar 31, 2009 at 08:37 AM

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  How to write a complex number with the help of trigonometry?

  Posted by tufa on Mar 28, 2009 at 07:31 AM

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  Please demonstrate this equation: (sin^2)x + (cos^2)x=1

  Posted by drole on Mar 12, 2009 at 12:07 PM