Question

find the angle between two vectors of magnitude 30 unit and 40 unit , so that their resultant is 50 unit

Answer 1

Answer:

i cant use the same numbers but use this and try thankyou have a great day mate

Explanation:

Let the two vectors be P and Q and their resultant vector be R.

Let the angle between P and Q be θ.

Given: ∣P∣=3, ∣Q∣=4  and  ∣R∣=5 units

Magnitude of resultant vector  ∣R∣  

2

=∣P∣  

2

+∣Q∣  

2

+2∣P∣∣Q∣cosθ

∴   5  

2

=3  

2

+4  

2

+2(3)(4)cosθ

We get  cosθ=0

⟹θ=90  

o

Answer 2

Answer:

90°

Please view the attachment for step by step explanation.