If the pointer of the instrument rotates 30 ° clockwise, it will be recorded as - 30 ° and then + 45 ° means -______ , 0 ° denotes______ ． | Math enthusiast | Mathematical art

If the pointer of the instrument rotates 30 ° clockwise, it will be recorded as - 30 ° and then + 45 ° means - , 0 ° denotes ．

If the pointer of the instrument rotates 30 ° clockwise, it is recorded as - 30 °, then + 45 ° indicates that it rotates 45 ° counterclockwise, and 0 ° indicates that it does not move; so the answer is: rotate 45 ° counterclockwise, and the pointer does not move

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