Sine and Cosine of Complementary Angles
Geometry · Flashcards
GEOMETRY · FLASHCARDS
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QUESTION
What is the Pythagorean identity connecting
sin
(
θ
)
\text{sin}(\theta)
sin
(
θ
)
and
cos
(
θ
)
\text{cos}(\theta)
cos
(
θ
)
?
QUESTION
Which side is always the hypotenuse relative to an acute angle in a right triangle?
QUESTION
What is the definition of
adjacent
hypotenuse
\frac{\text{adjacent}}{\text{hypotenuse}}
hypotenuse
adjacent
for an acute angle
θ
\theta
θ
?
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ANSWER
adjacent
hypotenuse
=
cos
(
θ
)
\frac{\text{adjacent}}{\text{hypotenuse}}=\cos(\theta)
hypotenuse
adjacent
=
cos
(
θ
)
. Basic trigonometric ratio using adjacent side and hypotenuse.
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