Question

Cos 0°-cos 180°+tg 45°=

Answer 1

Cos 0°-cos 180°+tg 45＝45°

Answer 2

The expression can be simplified as follows:

cos(0°) = 1 (cosine of 0 degrees is 1) cos(180°) = -1 (cosine of 180 degrees is -1) tan(45°) = 1 (tangent of 45 degrees is 1)

Therefore, the expression becomes:

1 - (-1) + 1 = 3