year 1 AS vectors

[steep sleet]

<@&286206848099549185>

[steep sleet]

What does dot mean

Does it mean if J is negative then it lies between 0-90

But if i is negative then it lies between 90-180

[keen edge]

Their product is neg then btw 90 n 180

Their product is pos, then btw 0 and 90

[steep sleet]

I don't understand

<@&286206848099549185>

[keen edge]

Oh, this is unit vector

I thought is only vector

Misread question 🤦‍♂️

[steep sleet]

There is question similar to this maybe textbook is wrong

I understand this why you dont add 90 cause x axis

[idle charm]

if I'm not mistaken i is x-axis and j is y-axis, right?

[steep sleet]

Yea

But some questions in this book might be just wrong

[karmic patio]

adding 90 is the correct one
probably the question is wrong