Trig Reading on Vectors

What is a scalar quantity?

• A quantity with only magnitude

• A quantity with both magnitude and direction

• A quantity with only direction

• A quantity with neither magnitude nor direction

Which of the following is a vector quantity?

• Time

• Mass

• Speed

• Velocity

What is the sine of angle θ in a right triangle?

• Ratio of opposite side to hypotenuse

• Ratio of adjacent side to hypotenuse

• Ratio of opposite side to adjacent side

• Ratio of hypotenuse to opposite side

How do you find the angle when the sides of a triangle are known?

• Use inverse trigonometric relations

• Use Pythagorean theorem

• Use direct trigonometric ratios

• Use vector addition

What is the tangent of angle θ in a right triangle?

• Ratio of opposite side to adjacent side

• Ratio of adjacent side to hypotenuse

• Ratio of opposite side to hypotenuse

• Ratio of hypotenuse to adjacent side