Answer:
[A] use the complementary relationship between sine and cosine to rewrite sin(x + y) as cos(pi/2-(x+y)). apply the cosine sum identity. then simplify using sin(–y) = –sin(y) and cos(–y) = cos(y).
Step-by-step explanation:
i got it right
screw that other person l0l
note that sin(-x)=-sin(x) and cos(-x)=cos(x)
so sin(-y)=-sin(y) and cos(-y)=cos(y)
or something like that idfk
Answer: Hope this helps. I didn't see any graphs posted on your question.
Step-by-step explanation:
y = -x²-1
y = 2x²-4
Edit: posted wrong screenshot :/
here is the actual one lol
Answer: I don't really understand what you trying to say maybe word it up better
Step-by-step explanation:
Answer:
Your slope of the line is -3/10.
Step-by-step explanation:
Use the following equation:
<em>m</em> (slope) = (y₂ - y₁)/(x₂ - x₁)
Let:
(x₁ , y₁) = (-2 , 7)
(x₂ , y₂) = (18 , 1)
Plug in the corresponding numbers to the corresponding variables:
<em>m</em> = (1 - 7)/(18 - (-2))
Simplify. First solve the parenthesis, then divide:
<em>m</em> = (-6)/(18 + 2)
<em>m</em> = -6/20
Simplify.
<em>m</em> = (-6/20)/(2/2) = -3/10
Your slope of the line is -3/10.
~
The standard form of a quadratic equation is :
ax² + bx + c = 0
And the quadratic formula is:
x=\frac{-b\pm\sqrt{b^2-4ac}}{2a} .
So, first step is to compare the given equation with the above equation to get the value of a, b and c.
So, a = -1, b = 2 and c = 1.
Next step is to plug in these values in the above formula. Therefore,
So, x =