" 65."(a)((1+sin theta-cos theta)/(1+sin theta+cos theta))^(2)=(1-cos theta)/(1+cos theta)

Prove: ((1+sin theta-cos theta)/(1+sin theta+cos theta))^(2)=(1-cos theta)/(1+cos theta)

(sin theta-cos theta+1)/(sin theta+cos theta-1)=(1+sin theta)/(cos theta)

((sin theta+cos theta)^(2)-1)/(sin theta*cos theta)

If sin theta+cos theta=1 then sin theta cos theta=

(sin theta)/(1-cos theta)=(1+cos theta)/(sin theta)

((sin theta+cos theta-1)/(sin theta-cos theta+1))(1+sin theta) =

(1+sin2 theta-cos2 theta)/(1+sin2 theta+cos2 theta)=tan theta

(1-cos theta)/(sin theta)=(sin theta)/(1+cos theta)

(1-cos theta)/(sin theta)=(sin theta)/(1+cos theta)

If ((1+sin theta-cos theta))/((1+sin theta+cos theta))+((1+sin theta+cos theta))/((1+sin theta-cos theta))=4 , then which of the following values will be suitable for theta ? यदि ((1+sin theta-cos theta))/((1+sin theta+cos theta))+((1+sin theta+cos theta))/((1+sin theta-cos theta))=4 है, तो theta के लिए निम्नलिखित में से कौन सा मान उपयुक्त होगा?