Discussions

• cos(b+c-a)+cos(c+a-b)+cos(a+b-c)+cos(a+b+c)=4cosa.cosb.cosc?

  1 view 3 comments 0 points Most recent by anonymous June 2021Science & Mathematics
• cos(b+c-a)+cos(c+a-b)+cos(a+b-c)+cos(a+b+c)=4cosa.cosb.cosc?

  1 view 3 comments 0 points Most recent by anonymous May 2021Science & Mathematics