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Onlysy

Asked 1 year ago

SG Secondary 1 Geometry and Measurement

Help

Replies 0

Develixxo

Asked 1 year ago

SG Grade: N/A Strand: N/A

Solve question plsspslsl 🙏🙏🙏

Replies 1

anonymous

The vector -CB can be obtained by flipping the CB vector in the opposite direction. Hence the resultant vector of AB-CB will point from A to C. The magnitude of the resultant vector is equal to the length AC. Hence, using cosine rule (AC^2=AB^2+CB^2-2(AB)(BC)cosABC), AC can be found. The answer will be positive as the question is asking for the magnitude of the resultant vector.

1 year ago