Tuesday

July 22, 2014

July 22, 2014

Posted by **marley** on Friday, June 10, 2011 at 1:27am.

Vector a= 2i + 3j, then the angle between vector a and y axis is?

Plz solve

- science(physics) -
**drwls**, Friday, June 10, 2011 at 2:26amcosine theta = (a*i)/|a|

|a| is the magnitude of the a vector,

which is sqrt13 = 3.6056

a*1 is the dot product of a and the i vector, which is 2.

Therefore cos theta = 2/3.6056 = 0.5547

theta = 56.3 degrees

**Related Questions**

science(physics) - vector a+ vector b= 2i Vector a+ vector b=4j Then the angle ...

science (physics) Need to solve this today please - (a) Express the vectors A, B...

Physics - For the three vectors A+B+C= -1.4i. Vector A is 4i and vector C is -...

physics - Two vectors are given by a = 1.8 x - 9.6 y and b = -17.5 x + 1.6 y. ...

physics - A football player runs the pattern given in the drawing by the three ...

Vectors (Physics/Math) - Vector A has a magnitude of 18 (in some unspecified ...

physics - Vector vector A has a magnitude of 6.90 units and makes an angle of 46...

physics [vectors] - The concept i get, but somehow i just can't execute this ...

Physics - The two vectors a and b have equal magnitudes(on an x-y plane vector a...

physics - The magnitude of vector A is 18 units at an angle of 90 degrees with ...