Yahoo Web Search

  1. Sort by

  1. sin3y/siny = sin(y+2y) / siny = ( sinycos2y + cosysin2y) / siny Using sin2y = 2sinycosy = [ sinycos2y + 2siny(cosy)^2 ] / siny = siny[ cos2y + 2(cosy)^2 ] / siny = cos2y + 2(cosy)^2 = cos2y + 2(cosy)^2 - 1 + 1 Using cos2y = 2(cosy)^2 - 1 = cos2y + cos2y + 1 = 2cos2y + 1

    3 Answers · Science & Mathematics · 28/12/2008

  2. Note that the side in the middle is shared by both triangles. This means that that side is congruent for both triangles as well. Since we have two sides congruent already and the side shaded is congruent, all 3...

    2 Answers · Science & Mathematics · 25/04/2010

  3. the trick is to multiply the numerator&denominator of the right side by (1-sinθ) to get 1-sin(θ)^2 that way you can convert to cos(θ)^2 then you break the fraction into two look here: http://i279.photobucket.com/albums/kk124/firelilee/img475.jpg

    4 Answers · Science & Mathematics · 04/03/2009

  4. sec=1/sin cosec=1/cos cot=1/tan=cos/sin sina/1/sina+cosa/sina-1+cosa/1/cosa+cosa/sina+1= 1. sin^2a+sina/cosa+cosa/sina-1+cos^2a+1=1 (sin^2a+cos^2a)+(sin^2a+cos^2a)/coasina-1=1 1+(cos^2a+sin^2a-1=1 1-1+(sin^2a+cos^2a=1sin^2a+cos^2a=1.

    2 Answers · Science & Mathematics · 26/05/2008

  5. why should one be penalized if you showing the two sides are equal ? Typically we start with the more complicated side and it usually is on left.

    3 Answers · Science & Mathematics · 11/01/2014

  6. Your first equation, using parentheses, is better. Yahoo!Answers doesn't lend itself to vertical fractions! Use the Pythagorean Identity sin²θ = 1-cos²θ...

    1 Answers · Science & Mathematics · 14/10/2016

  7. If you mean cos(2A) then (1+cos2A)/(cos2A) = Tan2A/tanA 1+cos2A=tan2A*cos2A/tanA 1+cos2A=sin2A/tanA 1+cos2A=(2*sinA*cosA)/(sinA/cosA) 1...

    1 Answers · Science & Mathematics · 07/05/2008

  8. take log(base a) both sides

    3 Answers · Science & Mathematics · 04/08/2012

  9. http://www.openaspdf.com/files/735057/WolframAlpha--_1_cos_x____tan_x___2____1_sin_x____1_sin_x____Result__2014_03_06_0259.pdf

    2 Answers · Science & Mathematics · 11/03/2014

  10. ( 0! + 0! + 0! + 0! ) ! = 24 ( (0! +0!) ^ (0! +0!) ) ! = 24

    1 Answers · Science & Mathematics · 08/07/2008

  1. Try asking your question on Yahoo Answers