10 points!!! Math problem (:?

Comments

• abcdef

  May 2021

  1.

  sin x + cos x multiply and divide by sinx

  = sin x( sin x/sin x + cos x/sin x)

  = sin x(1 + cot x)

  Since sin x = 1/cosec x

  = (1 + cot x)/cosec x

  2. since sin^2x + cos^2x = 1

  cos^2x = 1 - sin^2x

  cos^2x = (1 + sinx)(1 - sinx)

  cosx*cosx = (1 + sinx)(1 - sinx)

  cosx/1+sinx = 1-sinx/cosx
• surendhar

  May 2021

  1.sinx+cosx=1/cscx+cosx then take l.c.m then 1/cscx+cosx=(1+cscx*cosx)/cscx=cotx+1/csx.

  2.cosx/1+sinx=(cosx/1+sinx)*((1-sinx)/(1-sinx)) {conjucating} this equals to (cosx*(1-sinx))/1-sinx^2 this equals to cosx(1-six) / cosx^2 this equals to i-sinx/cosx........