How do I do the dot product with vectors?
You multiply the terms of each vector that have the same unit vector (e.g. i, j, k). For example, you multiply the i terms in the first vector by the i terms in the second vector. When you've multiplied them the answer will be a scalar (it doesn't have any vector terms like i, j, k).
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Related Maths GCSE answers
All answers ▸Solve 67x – 5 = 12x + 13
Gavin, Harry and Isabel each earn the same salary. Gavin saves 28% of his salary. Harry spends 3/4 of his salary and saves the rest. The amount Isabel saves:The amount she spends=3:7. Who saves the most?
There are n sweets in a bag, 6 of which are red. The rest of the sweets are blue. Jen removes 1 sweet from the bag. Jen then takes another sweet from the bag. The probability that Hannah takes two red sweets is 1/3. Show that n²-n-90=0.
A graph of a linear equation passes through 2 points, (2,9) and (-3,-1). Find the equation of the line in the form y=mx+c.