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dolphi86 [110]
3 years ago
15

Determinați numărul real a, stiind că punctul A (1, 0) aparține graficului funcției f:R cu valori în R, f(x)=x-a...Ajutati-ma va

rog

Mathematics
2 answers:
sweet-ann [11.9K]3 years ago
5 0
A (a,0 ) apartine Gf <=> f(a) =0 f(a) =a-2=0 a-2=0 a=2 => A(2,0) apartine Gf.
attashe74 [19]3 years ago
5 0
A i think is the awser hope it helps and good luck 

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Which one is it A. B. C. or D.
Anna35 [415]
 the correct one is A :) 

7 0
3 years ago
PLEASE HELP ME.<br> THANKS!!!
Veronika [31]

Cos(x) = sin(x + 20o) Use the double cos angle formula

Cos(x) = sin(x)*cos(20) + cos(x)*sin(20) Divide through by cos(x). Tanx = sin(x)/cos(x)

1 = tan(x)*cos(20) + sin(20) Subtract sin(20) from both sides.

1 - sin(20) = tan(x)*cos(20) Calculate the value of 1 - sin(20)

0.65798 = tan(x) * 0.939692 Divide by cos(20)

tan(x) = 0.65795/0.939692

tan(x) = 0.70021 Take the inverse of 0.7) = tan(x)

x = tan-1(0.70021)

x = 35 degrees as expected.

Problem Two

The easiest way to do this is to pick random values and try it. The two acute angles are complementary. So 25 and 65 are random enough.

Let A = 25

Let C = 65

A

Tan(25) = sin(25)/sin(65) ; tan(25) = 0.4663.

sin(25)/sin(65) = 0.4663 Answer

B

Sin(90 - C) = Sin(A)

Tan(90 - A) = Tan(C)

So the question becomes Cos(A) = Tan(C) / sin(A)

Cos(25) = Tan(65)/Sin(25)

0.906 = ? 5.07 This statement isn't true.

C

Sin(65) = Cos(25)/Tan(65)

.906 = 0.4226 C is not the correct answer.

D

D isn't true. The tan does not relate that away. You can find it for yourself.

Cos(A) = Tan(C) You should get 0.906 = 2.14

E

Sin(C) = Cos(A) / Tan(A) I'll leave you to show this is wrong.

Problem 3

The diagram below is for this problem. Cos(x) = 50/100 = 0.5

x = cos-1(0.5)

x = 60 degrees.

Part 2

Sin(60) = opposite / hypotenuse

opposite = sin(60) * hypotenuse

opposite = 86.61 Be sure and round this to whatever the question says to round it to.



4 0
3 years ago
The question attached please.
Luda [366]

One adult ticket costs £11 and one child ticket costs £8.5

Step-by-step explanation:

Let,

Adult ticket = a

Child ticket = c

According to given statement;

3a+4c=67   Eqn 1

5a+6c=106   Eqn 2

Multiplying Eqn 1 by 5;

5(3a+4c=67)\\15a+20c=335\ \ \ Eqn\ 3

Multiplying Eqn 2 by 3;

3(5a+6c=106)\\15a+18c=318\ \ \ Eqn\ 4

Subtracting Eqn 4 from Eqn 3

(15a+20c)-(15a+18c)=335-318\\15a+20c-15a-18c=17\\2c=17\\

Dividing both sides by 2

\frac{2c}{2}=\frac{17}{2}\\c=8.5

Putting c=8.5 in Eqn 1

3a+4(8.5)=67\\3a+34=67\\3a=67-34\\3a=33

Dividing both sides by 3;

\frac{3a}{3}=\frac{33}{3}\\a=11

One adult ticket costs £11 and one child ticket costs £8.5

Keywords: Linear equation, subtraction

Learn more about linear equations at:

  • brainly.com/question/10666510
  • brainly.com/question/10699220

#LearnwithBrainly

6 0
3 years ago
Select the correct answer.<br> Σ(-)),<br> Which expression gives the same result as t=0
Monica [59]

Answer:

B

Step-by-step explanation:

since 5 is constant so you can take it out from the summation

6 0
3 years ago
Which two triangles are similar?
Alla [95]

Answer:

A and C are similar

Step-by-step explanation:

The sum of a triangles angles = 180

If you calculate the remaining angles, you will see that both A and C have the same angles and therefore are similar.

6 0
3 years ago
Read 2 more answers
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