[cos(1)-cos(9)]*[cos(2)-cos(8)]*...*[cos(9)-cos(1)]=? please help!

1 Answer | Add Yours

Top Answer

beckden's profile pic

beckden | High School Teacher | (Level 1) Educator

Posted on

One of the factors in your expression will be [cos(5)-cos(5)]

This is zero and by the zero product principle anyting times zero is zero so the answer is 0

[cos(1)-cos(9)][cos(2)-cos(8)][cos(3)-cos(7)][cos(4)-cos(6)][cos(5)-cos(5)][cos(6)-cos(4)][cos(7)-cos(3)][cos(8)-cos(2)][cos(9)-cos(1)]=0

We’ve answered 318,944 questions. We can answer yours, too.

Ask a question