Question

Answer the following:

State the signs of cot 1899°

Answer 1

1899° = 5 x 360° + 99°

∴ 1899° and 99° are co-terminal angles.

Since 90° < 99° < 180°,

99° lies in the 2^nd quadrant.

∴ 1899° lies in the 2^nd quadrant.

∴ cot 1899° is negative.