If for all real x the vector `cxhati-6hatj+3hatk and xhati+2hatj+2cxhatk` makes an obtuse angle with one another then find the value of c

Determine the value of c so that for the real x, vectors cx hati - 6 hatj - 3 hatk and xhati + 2hatj + 2cx hatk make an obtuse angle with each other .

Determine the value of c so that for the real x, vectors cx hati - 6 hatj - 3 hatk and xhati + 2hatj + 2cx hatk make an obtuse angle with each other .

The value of c so that for all real x, the vectors cxhatk + 3hatj, xhati + 2hatj + 2cx hatk make an obtuse angle are:

The value of c so that for all real x, the vectors cxhatk + 3hatj, xhati + 2hatj + 2cx hatk make an obtuse angle are:

If vectors axhati+3hatj-5hatk and xhati+2hatj+2axhatk make an acute angle with each other, for all x in R then a belongs to the interval

Find the angle between the vectors hati-2hatj+3hatk and 3hati-2hatj+hatk .

Find the angle between the vectors hati-2hatj+3hatk and 3hati - 2hatj + hatk

Find the angle between the vectors 4hati-2hatj+4hatk and 3hati-6hatj-2hatk.