CFA Review Topics

Front

What is the sine function in a right triangle?

Back

The sine function (sin) is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the cosine function in a right triangle?

Back

The cosine function (cos) is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the tangent function in a right triangle?

Back

The tangent function (tan) is the ratio of the length of the opposite side to the length of the adjacent side.

Front

How do you find the missing angle in a triangle?

Back

Use the sine, cosine, or tangent functions along with the known sides to set up an equation and solve for the angle.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²).

Front

How do you round a number to the nearest tenth?

Back

Look at the hundredths place; if it is 5 or more, round up the tenths place by one. If it is less than 5, keep the tenths place the same.

Front

What is the formula for finding the length of a side in a right triangle using sine?

Back

If you know an angle and the hypotenuse, the length of the opposite side can be found using: opposite = hypotenuse * sin(angle).

Front

What is the formula for finding the length of a side in a right triangle using cosine?

Back

If you know an angle and the hypotenuse, the length of the adjacent side can be found using: adjacent = hypotenuse * cos(angle).

Front

What is the formula for finding the length of a side in a right triangle using tangent?

Back

If you know an angle and the lengths of the opposite side, the adjacent side can be found using: adjacent = opposite / tan(angle).

Front

What is the relationship between degrees and radians?

Back

Degrees and radians are two units for measuring angles; 180 degrees is equal to π radians.