Analysis: (1) In this problem, if the robot is to move to A, it must rotate 45 clockwise from the origin, that is, the direction of the load. Then according to the coordinates of point A, the driving distance can be 2, so the instruction should be [,45].

(2) This question actually seeks the number of ∠OAC and the length of AC. According to the meaning of the question, we can know that AC=PC, PB=4+2, AB=2, then we can use PC (that is, AC) to represent BC, and then we can find out the length of AC in the right triangle ABC, so we can also find out the degrees of ∠BAC and ∠OAC. solution

(2) According to the meaning of the question: AC=PC, PB=4+2.

∴BC=4+2 -AC

In the right triangle ABC, BC=4+2 -AC, AB=2, according to Pythagorean theorem:

(4+2 -AC)2+4=AC2

The solution is AC=4,

∴∠BAC=30，∠OAC=45+30=75

So the instruction to the robot should be [4,75].