Cos ALPHA + Cos (180-ALPHA) = ??? Please help
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Cos ALPHA + Cos (180-ALPHA) = ??? Please help

[From: ] [author: ] [Date: 12-05-17] [Hit: ]
......
Cos (180-A) = -Cos A. so, the ans is zero

-
cos(180 -x) = -cos(x)
so cos(alpha) + (-cos(alpha)) = 0

-
cosA + cos180cosA+sin180sinA =
cosA - cosA + 0 = 0
1
keywords: 180,Cos,help,Please,ALPHA,Cos ALPHA + Cos (180-ALPHA) = ??? Please help
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