The identity below was verified incorrectly In which line wa

The identity below was verified incorrectly. In which line was an error first made? 1 + csc(-theta)/cos(-theta) + cot(-theta) = sec theta 1 - csc theta/cos theta - cot theta = sec theta cot theta/cos theta - cot theta = sec theta cot theta = sec theta (cos theta - cot theta) cot theta = 1/cos theta(cos theta - cot theta) cot theta = 1 - cot theta/cos theta

Solution

mistake was first identified in line 2 because 1 - csc(theta ) is not equals to cot ( theta )