Question

Please help fast

A=___
b=___
c=___
Solve for θ and round your answer to the nearest degree.
θ =___ degrees

Answer 1

9514 1404 393

Answer:

• a = -11
• b = 13
• c = 17
• θ = 93°

Explanation:

║u║ = √((-2)²+3²) = √13

║w║ = √(4²+(-1)²) = √17

u·v = (-2)(4) +(3)(-1) = -8-3 = -11

Then the formula for cos θ gets filled in as ...

`\cos\theta=(-11)/(√(13)\cdot√(17))\\\\\theta=\arccos{\left(-\sqrt{(121)/(221)}\right)}\approx\boxed{93^(\circ)}`

• a = -11
• b = 13
• c = 17