formula for the slope of a line, problem solving by solving simpler parts first, and cartesian plane for graphing.
Answer:
y-8=2(x-9)
Step-by-step explanation:
m=y2-y1/x2-x1
10-8/10-9=2
y-y1=m(x-x1)
y-8=2(x-9)
Option C:
x = 90°
Solution:
Given equation:
<u>To find the degree:</u>
Subtract 1 + cos²x from both sides.
Using the trigonometric identity:
Let sin x = u
Factor the quadratic equation.
u + 2 = 0, u – 1 = 0
u = –2, u = 1
That is sin x = –2, sin x = 1
sin x can't be smaller than –1 for real solutions. So ignore sin x = –2.
sin x = 1
The value of sin is 1 for 90°.
x = 90°.
Option C is the correct answer.
Not completely sure but i think y is 3