Answer:
This will be s - r.
Step-by-step explanation:
Here,
SinB = r
CosB = s
SinB = AC/BC
Also,
CosC = AC/ BC
So, we can say SinB = CosC = r
Again,
CosB = AB/ BC
Also,
SinC = AB/ BC
So,
CosB= SinC = s
So,
SinC - CosC = s - r
Answer:
To create a trinomial square on the left side of the equation, find a value that is equal to the square of half of
b
.
(
b
2
)
2
=
(
−
3
)
2
Add the term to each side of the equation.
x
2
−
6
x
+
(
−
3
)
2
=
22
+
(
−
3
)
2
Simplify the equation.
Tap for more steps...
x
2
−
6
x
+
9
=
31
Factor the perfect trinomial square into
(
x
−
3
)
2
.
(
x
−
3
)
2
=
31
Solve the equation for
x
.
Tap for more steps...
x
=
±
√
31
+
3
The result can be shown in multiple forms.
Exact Form:
x
=
±
√
31
+
3
Decimal Form:
x
=
8.56776436
…
,
−
2.56776436
…
Step-by-step explanation:
thats took a while lol
Number of pencils bough by the student = 84
Number of pencils sharpened by the student = 35
Then
The number of pencils that was not sharpened = (84 - 35)
= 49
So 35 pencils have been sharpened and 49 pencils have not been sharpened.
Then Number of pencils unsharpened:Number of pencils sharpened = 49:35
= 7:5
So the ratio of the number of unsharpened pencil to the number of sharpened pencil is 7:5
