Unit 15 Summary Basic Trigonometry Basic Trigonometry and Vectors Flashcards
Many AC formulas are based
right triangles.
A right triangle is a triangle that contains
90∘ , or right, angle.
The Pythagorean theorem states that the sum of the squares of the sides of a right triangle
equals the square of the hypotenuse.
The sum of the angles of any triangle is
180∘ .
The relationship of the length of the sides of a right triangle to the number of degrees in its angles can be expressed as the
expressed as the sine, cosine, or tangent of a particular angle.
What is the sin ∠ø
The sine function is the relationship of the opposite side divided by the hypotenuse.
What is the cosin ∠ø
The cosine function is the relationship of the adjacent side divided by the hypotenuse.
What is the tangent ∠ø
The tangent function is the relationship of the opposite side divided by the adjacent side.
longest side of a right triangle.
The hypotenuse is always the longest side of a right triangle.
A simple saying that can be used to help remember the relationship of the trigonometric functions to the sides of a right triangle is
Oscar Had A Heap Of Apples .
Vectors are lines that indicate both
magnitude and direction.
Scalars indicate
magnitude only.
To find the unknown side of a triangle what formula should you use
The Pythagorean theorem
