[[" 3) "(1-e cos theta)/(cos theta-e)," 4) "(cos v)/(1-e cos theta)],[" 11.If "k=tan25^(@)" then "(k-1)/(k+1)+(k+1)/(k-1)=]]

(cos theta)/(cos ec theta+1)+(cos theta)/(cos ec theta-1)=2tan theta

Prove: 1+(cot^2theta)/(1+cos e c\ theta)=cos e c\ theta

Prove: (costheta)/(cos e c\ theta+1)+(costheta)/(cos e c\ theta-1)=2tantheta

If sin theta.cos theta = k then find the sin theta + cos theta .

If (cos theta)/(1+sin theta)-(1-sin theta)/(cos theta)=2k then the value of k is :

If tan(theta)/(2)=sqrt((1-e)/(1+e))tan(alpha)/(2), then cos alpha=1-e cos(cos theta+e)(b)(1+e cos theta)/(cos theta-e)(c)(1-e cos theta)/(cos theta-e) (d) (cos theta-e)/(1-e cos theta)

If cosec theta + cot theta =k , then prove that cos theta =(k^(2)-1)/( k^(2)+1)

If cosec theta + cot theta =k , then prove that cos theta =(k^(2)-1)/( k^(2)+1)

If cosec theta + cot theta =k , then prove that cos theta =(k^(2)-1)/( k^(2)+1)

If cosec theta + cot theta =k , then prove that cos theta =(k^(2)-1)/( k^(2)+1)