y = x^2 - 5
y + 5 = x^2
(Now you need to square root both sides)
√y+5 = x
x = PLUS OR MINUS √y + 5
B)
as you recall yesterday, the "far arc near arc" formula, well, notice, the angle at XDY intercepts the circle at XY, with a "near arc" of 100°, and a "far arc" of 360° - 100° = 260°.
so using the far arc near arc formula
the twin angles at A and C will take the slack from all interior angles of 180° - 80° = 100°, so then ∡A = ∡C = 50°.
Answer:
x = 5/2 x = -4
Step-by-step explanation:
2x^2 + 3x – 20 = 0
Factor
(2x -5) (x+4) = 0
Using the zero product property
2x-5 =0 x+4 = 0
2x=5 x = -4
x = 5/2 x = -4
Answer:
30°, 45° and 60°
Step-by-step explanation:
Sine, Cosine and Tangent
Because the radius is 1, we can directly measure sine, cosine and tangent.
unit circle center angle 0
What happens when the angle, θ, is 0°?
cos 0° = 1, sin 0° = 0 and tan 0° = 0
unit circle center angle 90
What happens when θ is 90°?
cos 90° = 0, sin 90° = 1 and tan 90° is undefined