Trigonometry and Polar Coordinates
AP Precalculus · Flashcards
AP PRECALCULUS · FLASHCARDS
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QUESTION
What is the double angle formula for tangent?
QUESTION
What is the secant of an angle in terms of cosine?
QUESTION
State the angle addition formula for cosine.
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ANSWER
cos
(
a
+
b
)
=
cos
a
cos
b
−
sin
a
sin
b
\cos(a + b) = \cos a \cos b - \sin a \sin b
cos
(
a
+
b
)
=
cos
a
cos
b
−
sin
a
sin
b
. Used to find cosine of sum of two angles.
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