1.

The involute function is defined as

A. inv ϕ = tan ϕ - ϕ
B. inv ϕ = tan ϕ – sin ϕ
C. inv ϕ = tan ϕ – cos ϕ
D. inv ϕ = tan ϕ
Answer» B. inv ϕ = tan ϕ – sin ϕ


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