Answer: cos(x)
Step-by-step explanation:
We have
sin ( x + y ) = sin(x)*cos(y) + cos(x)*sin(y) (1) and
cos ( x + y ) = cos(x)*cos(y) - sin(x)*sin(y) (2)
From eq. (1)
if x = y
sin ( x + x ) = sin(x)*cos(x) + cos(x)*sin(x) ⇒ sin(2x) = 2sin(x)cos(x)
From eq. 2
If x = y
cos ( x + x ) = cos(x)*cos(x) - sin(x)*sin(x) ⇒ cos²(x) - sin²(x)
cos (2x) = cos²(x) - sin²(x)
Hence:The expression:
cos(2x) cos(x) + sin(2x) sin(x) (3)
Subtition of sin(2x) and cos(2x) in eq. 3
[cos²(x)-sin²(x)]*cos(x) + [(2sen(x)cos(x)]*sin(x)
and operating
cos³(x) - sin²(x)cos(x) + 2sin²(x)cos(x) = cos³(x) + sin²(x)cos(x)
cos (x) [ cos²(x) + sin²(x) ] = cos(x)
since cos²(x) + sin²(x) = 1
Answer:
Its the first graph ok kid
Step-by-step explanation:
y = -0.65 (6) + 7.34
y = 3.44
but the dot plot showed when x = 6, y = 4
so 4 - 3.44 = 0.56
Answer
0.56
Answer:
principal=$300
time=1 year
simple interest=$54
rate=?
Step-by-step explanation:
rate=(simple interest×100)/(principal×time)=(54×100)(300×1)=5400/300=54/3=18% is rate
Answer:
<h3>The option b)
is correct</h3>
Step-by-step explanation:
Given that " For a skewed data set, we say that a data set doesn't vary much "
<h3>To say a skewed data set doesn't vary much :</h3>
- Here Mean is 0.5
- For a skewed data set we have Median is always greater than Mean
- That is Median > Mean=0.5
<h3>Therefore Median > 0.5</h3>
Median is closer to 
> 
For a skewed data set, we say that a data set doesn't vary much if
<h3>Therefore the option b)
is correct</h3>
