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1. |
What is the formula for the internal tapered angle of blind hole? |
A. | Sin A/2 = (l<sub>1</sub>-l<sub>2</sub>)/2h |
B. | Cot A/2 = (l<sub>1</sub>-l<sub>2</sub>)/2h |
C. | Cos A/2 = (l<sub>1</sub>-l<sub>2</sub>)/2h |
D. | Tan A/2 = (l<sub>1</sub>-l<sub>2</sub>)/2h |
Answer» E. | |