Flashcard No. 7.1-7.2 in Geometry (Trigonometric Ratios )

Front

What does SOH-CAH-TOA stand for?

Back

SOH-CAH-TOA is a mnemonic for remembering the definitions of the sine, cosine, and tangent functions in a right triangle: Sine = Opposite/Hypotenuse (SOH), Cosine = Adjacent/Hypotenuse (CAH), Tangent = Opposite/Adjacent (TOA).

Front

What type of triangles can SOH-CAH-TOA be used for?

Back

SOH-CAH-TOA can only be used for right triangles.

Front

How do you find the measure of a missing angle in a right triangle?

Back

You can use trigonometric ratios (sine, cosine, tangent) to find the measure of a missing angle by setting up an equation based on the known sides.

Front

What is the opposite side in a right triangle?

Back

The opposite side is the side opposite to the angle you are considering.

Front

If the angle is 64 degrees, what is the measure of the complementary angle?

Back

The complementary angle is 26 degrees, since complementary angles add up to 90 degrees.

Front

How do you solve for x in a right triangle?

Back

You can use trigonometric ratios to set up an equation and solve for x, often involving inverse trigonometric functions.

Front

What is the formula for finding the sine of an angle?

Back

Sine of an angle = Opposite side / Hypotenuse.

Front

What is the formula for finding the cosine of an angle?

Back

Cosine of an angle = Adjacent side / Hypotenuse.

Front

What is the formula for finding the tangent of an angle?

Back

Tangent of an angle = Opposite side / Adjacent side.

Front

If the opposite side is 5 and the hypotenuse is 13, what is the sine of the angle?

Back

Sine = 5/13.