Question

Evaluate cot(-405°).

Answer 1

cotangent = reciprocal tangent

405-360 (above quadrant IV, just pretend it keeps going... each quadrant is worth 90 degrees) = 45

-tan(45)= -1

reciprocal of -1 divided by 1

-1/1 = -1

-1 is your answer

Answer 2

hello : cot(-405°) = - 1

Explanation:

cot(-405°) = - cot(405°) = - cot(360°+45°) = - cot(45°) = - 1