- #1

student34

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## Homework Statement

The question asks to calculate (

**A**x

**B**)·

**C**, where

**A**'s magnitude is 5.00,

**B**'s magnitude is 4.00, and they are both in the xy-plane.

**B**is 37° counter clockwise from

**A**.

**C**has a magnitude of 6.00 and is in the +z-direction.

## Homework Equations

(

**A**×

**B**) = ABsinθ =

**D**; D·C = DCcosσ = R

## The Attempt at a Solution

(

**A**×

**B**) = 5×4×sin37° = 12.363 =

**D**. D·C = 12.363×6.00×sin90° = 72.2 = R which is the correct answer. But doesn't the dot in (

**A**×

**B**)·

**C**imply a scalar product in which case the last part should be 12.363×6.00×cos90°?