Let | vector OA | = | vector ob | = 3, ∠ AOB = 60 °, then | vector OA + vector ob|= By the way! | Math enthusiast | Mathematical art

Let | vector OA | = | vector ob | = 3, ∠ AOB = 60 °, then | vector OA + vector ob|= By the way!

order
|Vector OA | = | a | = 3, | vector ob | = | B | = 3
Then (| vector OA + vector ob |) ^ 2 = | a + B | ^ 2 = | a | ^ 2 + | B | ^ 2 + 2A * b = 9 + 9 + 2 * 3 * 3 * cos60 ° = 27
Then | vector OA + vector ob | = | a + B | = 3 √ 3

RELATED INFORMATIONS

1. Given vector | OA | = 1, | ob | = √ 3, OA * ob = 0, point C is on line ab Given vector | OA | = 1, vector | ob | = √ 3, vector OA * vector ob = 0, point C is on line AB, and angle AOC = 30 °, find (1) vector OA * vector OC (2) let vector OC = MOA + nob, find the value of real numbers m and n
2. Points a and B (5,0) satisfy the vector OA * vector ob = vector OA * vector Ba, │ vector OA + vector ob = √ 185, and then calculate the a coordinate
3. It is known that I is an imaginary unit. In the complex plane, Z1 = 1 + I, Z2 = 2 + 3I correspond to points a and B, O is the origin, and vectors OP, OA and ob satisfy OP = OA + xob, If point P is in the fourth image term Then the value range of X is?
4. In the geometric sense of vector, it is the distance (i.e. length) from the point of the vector on the coordinate plane to the origin / / must be to the origin (0,0)? Must go to the origin (0,0)? From point (4,5) to point (2,2), no?
5. Given the parallel vector of a plane and two points passing through the plane, how to solve the plane equation
6. A plane passing through point (1,0, - 1) and parallel to vectors a = (2,1,1) and B = (1, - 1,0), try to find the plane equation
7. If a plane passes through a point (1,0,1) and is parallel to the vectors a = {2,1,1} and B = {1, - 1,0}, the plane equation is solved?
8. Given that the plane passes through point m (1, - 1,1) n (0,1, - 3) and is parallel to vector a (1,1,1), the plane equation is solved
9. Given the plane intercept equation x / A + Y / B + Z / C = 1, how to get the normal vector of the plane directly through the equation without converting it into a general equation
10. [kneeling] given the normal vector of a plane and the two points it passes through, how to find the equation of the plane? Of course, it's a point method. In fact, you only need to know the point But my question is, if we bring in another known point, the result of the plane equation will be different. Isn't that contradictory?
11. What does OA vector multiply ob vector = 0 mean
12. Known vectors OA = (1,3), OB = (2,5) Given the vector OA = (1,3), OB = (2,5), OC = (m, m), if AB is perpendicular to BC, what is the real number m
13. If the vector OA = (3,2) ob = (4,7), then AB =?
14. AO*BO=AB?
15. Why vector Bo vector Ao = vector Ba?
16. If the vector OA (x, y), then is the vector Ao (- x, - y) Why?
17. Is the coordinate of vector Ao the same as that of vector OA?
18. Is negative OA vector equal to Ao vector? Note that OA is negative, not asking if OA is equal to Ao vector!
19. In quadrilateral ABCD, if vector AB = vector DC, it must be () a diamond B parallelogram C rectangle D square
20. In quadrilateral ABCD, AB is parallel to CD, ab = CD, AC bisects ∠ bad, and quadrilateral ABCD is diamond?