1+cos-sin²/sin(1+cos)=cot

1.	1+cos-sin²/sin(1+cos)=cot
Answer» 1+cos-sin^2/sin(1+cos)Here we can write sin^2 as 1-cos^2Therefore , 1+cos-(1-cos^2)/sin(1+cos)=1+cos-1+cos^2/sin(1+cos)= cos+cos^2/sin(1+cos)= cos(1+cos)/sin(1+cos)= cos/sin= CotHence Proved

Discussion