Question

if vector (acap+2bcap) is perpendicular to vector (5acap-4bcap), then find angle between acap and b cap​

Answer 1

Answer:

Let p=a^+2b^

and q=5a^-4b^

since P and q are perpendicular hence

p. q=0

5+6a^.b^-8=0

a^. b^=1/2

cost=1/2

t=cosinverse(1/2)

Explanation:

t=angle between vectors