Unit Circle
This is the angle in degrees of pi/2
What is 90
If given the opposite and hypotenuse sides of a right triangle, this is the function you would use.
What is sin
With cot(90-x), we can find this
What is tan(x)
To obtain a addition from a multiplication of two trig functions, we use
What are sum to product formulas
This is one triangle we simply cannot solve with the given measurements
What is AAA
At 225 degrees in the unit circle, this is the tangent value.
What is 1
All angles in a triangle add up to this in degrees
What is 180
An identity such as sin2+cos2=1 is an example of
What are pythagorean identities
The number of double angle cos functions from deriving its pythagorean identity
What is 3
Sometimes, when solving this triangle using the law of sin, we can end up with one triangle, two triangles, or none at all.
What are SSA triangles.
As sin is the y value, csc is
What is 1/y
From the origin to a point on the coordinate grid, this is the equation to use with sides a, b, and hypotenuse r to find r
What is r2=a2+b2
When solving trigonometric identities, one simple method is to do this.
What is get sin and cos
This is the only double angle formula that has exponents
What is cos2x
To solve a SAS triangle, we first find the opposite side of the given angle using this law
What is the law of cosines
In this quadrant, all trig functions are positive
What is quadrant 1
When given cos(-t), we can simply rewrite it as:
What is cos(t)
To solve identities with a sum of two different fractions on one side, we would first have to do this
What is find common denominator
In the sum to product formula for adding or subtracting two sin values, we need these two functions
What are sin and cos
When plotting a point on the polar grid, list one way we can obtain that same point with different coordinates.
What is (r,t+2npi) or (-r, t+pi+2npi)
This is the measure of central angle of a circle that intercepts an arc equal in length to the radius of the circle.
What is a radian
This is the abbreviation for all trig function solutions
In the base equation for graphing, y=Asin(Bx-c), A is this
What is Amplitude
This is the reason for adding a + or - sign for half angle formulas:
What are quadrants.
When translating rectangular to polar, we replace y with this trig function
What is cos(x)