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  1. 2(l + b) = perimeter 2(l + 7) = 38 2l + 14 = 38 2l = 38 - 14 = 24 l = 24/2 l = 12 To check: substitute l back into equation 2(12 + 7) = 38 2 (19) = 38 38 = 38 LHS = RHS

    1 Answers · Education & Reference · 20/04/2011

  2. ...log y -- Distributing the denominator log(x/7 + y/7)^2 = log x + log y -- LHS is a perfect square 2 log(x/7 + y/7) = log x + log y -- Power rule...

    1 Answers · Education & Reference · 08/12/2010

  3. LHS = tan² x - sin² x = [sin² x / cos²x] - sin²...

    1 Answers · Education & Reference · 25/06/2009

  4. ////////// LHS= (1-cos^2x+2cosx-1)/(2-cosx)(cosx+1) =cosx(2-cosx)/(2-cosx)(cosx+1) =cosx/(cosx+1) RHS=1/(1+(1/cosx)) =cosx/(1+cosx)=LHS

    1 Answers · Education & Reference · 22/04/2009

  5. ... 3 : (1 + tan^2x) / (1 - tan^2x) = sec^2 x LHS = 1 + [ (Sin x)^2 / ( Cos x)^2 ] = ( Cos^2 x + ...

    1 Answers · Education & Reference · 30/11/2008

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