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zaharov [31]
3 years ago
14

Simplify the expression: cot x sin x - sin quantity pi divided by two minus x. + cos x

Mathematics
1 answer:
podryga [215]3 years ago
3 0
\cot x= \frac{\cos x}{\sin x}  \\ \sin ( \frac{ \pi }{2}-x)=\cos x \\  \\ \cot x \sin x-\sin( \frac{ \pi }{2}-x) +\cos x= \\  \frac{\cos x}{\sin x} \sin x- \cos x+ \cos x= \\ \cos x- \cos x+ \cos x = \\ \cos x  \\  \\ \ \cot x \sin x-\sin( \frac{ \pi }{2}-x) +\cos x=  \cos x
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if you know that 7 x 8=56, how can you use the commutative property of multiplication to find the product of 8 x 7 ?
Fofino [41]
Its the same thing because your just switching the order which doesn't matter when your adding or multiplying
5 0
3 years ago
równanie zmiany prędkość autokaru poruszającego się po prostym odcinku szosy i rozpoczynającego hamowanie od szybkości 20m/s ma
Rasek [7]

Answer:

s = 22.5 m

Step-by-step explanation:

the equation for the speed change of a coach moving along a straight section of the road and starting braking at a speed of 20 m / s has the form v (t) = 25-5t. Using integral calculus, determine the coach's braking distance.

v (t) = 25 - 5 t

at t = 0 , v = 20 m/s

Let the distance is s.

s =\int v(t) dt\\\\s =\int (25 - 5t)dt\\\\s= 25 t - 2.5 t^2 \\

Let at t = t, the v = 20

So,

20 = 25 - 5 t

t = 1 s

So, s = 25 x 1 - 2.5 x 1 = 22.5 m

3 0
2 years ago
Pleasaaaaseee answer the all for BRAINLEST answer and thanks
kow [346]
X=2/4=1/2
s=1 1/2
r= 1/2
y= 2/7
w= 1 2/3
p=2/5
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3 0
3 years ago
Zubin has two pieces of string. One piece is 36 inches long and the other is 48 inches long. He wants to cut them into equal pie
skelet666 [1.2K]

Answer:

12 pieces each:

S_1 = 3\ in

S_2= 4\ in

Step-by-step explanation:

Given

S_1 = 36\ in -- first string

S_2 = 48\ in --- second string

Required

Determine the number of equal pieces

To do this, we first calculate the HCF of the length of both pieces (36\ and\ 48)

36 = 2 * 2 * 3 * 3

48 = 2 * 2 * 2 * 2 * 3

Common\ prime\ factors = 2, 2\ and\ 3

The HCF is:

HCF = 2 * 2 * 3

HCF = 12

<em>Hence, he can cut both strings to 12 pieces each</em>

<em></em>

<em>Recall that </em>

S_1 = 36\ in

<em>The first string can then be cut in to 3 inches each (i.e. 36/12)</em>

S_2 = 48\ in

<em>The first string can then be cut in to 4 inches each (i.e. 48/12)</em>

7 0
3 years ago
How do I solve for x
Bond [772]

Answer:

you have to figure out how big the angle is and then add the 38 and 21 and subtract that from the total i dont know if any of that made sense

Step-by-step explanation:

8 0
2 years ago
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