Intro to Trigonometric Ratios

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What are the three basic trigonometric ratios?

The three basic trigonometric ratios are sine (sin), cosine (cos), and tangent (tan).

How is the sine of an angle defined in a right triangle?

The sine of an angle is defined as the opposite side divided by the hypotenuse.

How is the cosine of an angle defined in a right triangle?

The cosine of an angle is the adjacent side divided by the hypotenuse.

How is the tangent of an angle defined in a right triangle?

The tangent of an angle is the opposite side divided by the adjacent side.

What is the abbreviation for sine?

The abbreviation for sine is sin.

What is the abbreviation for cosine?

The abbreviation for cosine is cos.

What is the abbreviation for tangent?

The abbreviation for tangent is tan.

Which trigonometric ratio uses the opposite side and hypotenuse?

The sine ratio uses the opposite side and hypotenuse.

Which trigonometric ratio uses the adjacent side and hypotenuse?

The cosine ratio uses the adjacent side and hypotenuse.

Which trigonometric ratio uses the opposite side and adjacent side?

The tangent ratio uses the opposite side and adjacent side.

In which quadrant are all trigonometric ratios positive?

All trigonometric ratios are positive in the first quadrant.

What is the sine of a 90-degree angle?

The sine of a 90-degree angle is 1.

What is the cosine of a 0-degree angle?

The cosine of a 0-degree angle is 1.

What is the tangent of a 45-degree angle?

The tangent of a 45-degree angle is 1.

What is one practical use of trigonometric ratios?

Trigonometric ratios are used in navigation, for measuring heights, and in architecture.