Answer:
Option 1 is correct.
Step-by-step explanation:
Given If the cos 90° = 0, then the value of sin 0° is
As cos Ф=sin(90-Ф)
because angles are complementary i.e Ф+(90-Ф)=90
∴ cos 90° = sin(90-90)°=sin 0°
cos 90°=0 gives sin 0°=0 as cos 90°=sin 0°
because the angles are complementary i.e 90°+0°=90°
Hence, option 1 is correct
19/25 = 0.76
311/500 = 0.622
5/8 = 0.625
145/8 = 18.12500
Divide the first number by the second like 145 divided by 18.
k = 4/24 = 1/6
x=5 and 3
x^2-8x+21=6
x^2-8x+21+16=6+16
(x-4)^2=1
(x-4)=±1, x=5 and 3
7
7*4=28 which is the closest u can get to 30 with out going past it
x^2 + 4x-12 =0
factor
(x+6) (x-2)=0
x+6=0 x-2=0
x=-6 x=2
are the x intercepts
Answer -6, 2
