What is the Pythagorean theorem?

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides: $$c^2 = a^2 + b^2$$ .

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

To find the missing angle, use the fact that the sum of the angles in a triangle is 180 degrees. If one angle is 90 degrees, subtract the sum of the other two angles from 90.

What is the sine of a 30° angle?

The sine of a 30° angle is $$\frac{1}{2}$$ .

What is the cosine of a 60° angle?

The cosine of a 60° angle is $$\frac{1}{2}$$ .

What is the tangent of a 45° angle?

The tangent of a 45° angle is 1, or $$\frac{1}{1}$$ .

In order to use trigonometric ratios, what type of triangle must be used?

Trigonometric ratios can only be used in right triangles.

What is the cosine of a 0° angle?

The cosine of a 0° angle is 1.

Trigonometric Ratios Flashcards

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the definition of sine (sin) in a right triangle?

Back

2.

FLASHCARD QUESTION

Front

What is the definition of cosine (cos) in a right triangle?

Back

3.

FLASHCARD QUESTION

Front

What is the definition of tangent (tan) in a right triangle?

Back

4.

FLASHCARD QUESTION

Front

What does SOH stand for in trigonometry?

Back

5.

FLASHCARD QUESTION

Front

What does CAH stand for in trigonometry?

Back

6.

FLASHCARD QUESTION

Front

What does TOA stand for in trigonometry?

Back

7.

FLASHCARD QUESTION

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, the sum of the angles is always 180 degrees, and one angle is always 90 degrees.

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