Answer:
-1
Step-by-step explanation:
The radian gives the coordinates: ( (found using the unit circle)
cot=x/y
Plug the x and y coordinates into their respective places in the equation.
You get the answer of -1.
-1
Use a unit circle to find "exact" values.
On the unit circle, first find your angle, 7pi/4. Its a big angle, 315° that's trivia right now though.
Then look at the coordinates of the point at 7pi/4. They are:
(root/2, -root2/2) See image.
sin is the y coordinate. cos is the x coordinate. tangent is y/x.
cotangent is the reciprocal of tangent. This means to find cotangent, flip over tangent.
cotangent is x/y.
cot 7pi/4 =
(root2/2)over(-root2/2)
= -1
B y = 3x^2 + 12x + 19
y = 3(x + 2)^2 + 7
To expand the square of the binomial,
either recall that (a + b)^2 = a^2 + 2ab + b^2, or use FOIL.
y = 3(x^2 + 4x + 4) + 7
y = 3x^2 + 12x + 12 + 7
y = 3x^2 + 12x + 19
Answer: B y = 3x^2 + 12x + 19
7.0 mi
see the attached figure to better understand the problem
step 1
Find the measure of angle C
Remember that the sum of the interior angles in any triangle must be equal to 180 degrees
so
substitute the given values
step 2
Find the measure of a
Applying the law of sines
solve for a
Step-by-step explanation:kkbg g
1). 7x - 2y = 5 , A = 7 , B = 2 , C = 5
2). 4x - y = 1 , A = 4 , B = - 1 , C = 1
3). 5x - 2y = 3 , A = 5 , B = - 2 , C = 3
4). 4x - 3y = 3 , A = 4 , B = - 3 , C = 3
5). 2x + y = 15 , A = 2 , B = 1 , C = 15
ima go with B to buddy
hope it's right if it's wrong I'm sorry