Question

If A = B+C and the values of A,B and C =

are

13, 12 and 5 respectively, then the angle between A

and C will be ​

Answer 1

Answer:

Option A is the answer.

HOPING THIS WILL HELP YOU PLZ MARK AS BRAINLIEST AND FOLLOW ME

Answer 2

Answer:

π/2

Explanation:

That's pretty easy if you we recall the formula for addition of 2 vectors.

vecA = vecB + vecC

Let the angle between the A and C vectors be x.

=> A² = B² + C² + 2BC(cos x)

Putting the values provided to us into the formula,

=> 13² = 12² + 5² + 2(12)(5)(cos x)

=> 169 - 169 = 300(cos x)

=> cos x = 0°

=> cos x = cos 90°

=> x = 90°

=> x = π/2