Question

Cos1°+cos2°+cos3°+....... +cos179° =

Answer 1

Answer:

Step-by-step explanation:

cos179=cos(180-1)=-cos1

cos178=cos(180-2)=-cos2

so

this repeats till (1,179),(2,178),(3,177),(4,176),(5,175),(6,174)-------(45,135)-----(135,45)

so all the terms cancel each other

so the result is zero