The dedendum circle diameter is equal to (where $$\varphi $$ = Pressure angle)
A. Pitch circle diameter × cos$$\,\varphi $$
B. Addendum circle diameter × cos$$\,\varphi $$
C. Clearance circle diameter × cos$$\,\varphi $$
D. Pitch circle diameter × sin$$\,\varphi $$
Answer: Option A

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