1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
serg [7]
2 years ago
7

Someone plzzzz help me

Mathematics
1 answer:
MA_775_DIABLO [31]2 years ago
5 0

Answer:

None of these

Step-by-step explanation:

The two cases are for trigonometry special angles.

The cosine of an angle is given as the adjacent side length divided by the hypotenuse side length

Cos ∅ = A/H

1. The case of 45°,45°,90°

Cos x = 1 /√2

2. The case of 30°, 60° ,90°

Cos x = 1/2   or  √3/2

   

You might be interested in
Factorise <br> a) 3x^2-7x+2<br> b)2x^2-x-3<br> c)3x^2-16x-12
Luba_88 [7]

Answer: Answers are in the steps read carefully!

Step-by-step explanation:

A) 3x^2 - 7x + 2 To factor this polynomial, you have to find two numbers that their product is 6 and their sum is -7.  The numbers -1 and -6 works out because -6 times -1 is 6  and -6 plus -1 is -7.

Now rewrite the polynomial as

3x^2 - 1x - 6x + 2   Now group it  

(3x^2 - 1x) (-6x+2)  Factor it by groups

x (3x -1)  -2(3x -1)    Now factor out 3x-1  

(3x -1) (x-2)  Done!    

B)  2x^2 - x -3     Now the same way.You will have two numbers that  their product is -6 and their sum is -1. You may be wondering how I get -6 .I get -6 by multiply the leading coefficient  2 by the constant -3.  The numbers -3 and 2 works out. Because -3 times 2 is -6 and -3 plus 2 is -1.

 Rewrite the polynomial as

2x^2 +2x - 3x -3     GRoup them and factor them

(2x^2 + 2x)  (-3x-3)  

2x(x+1) -3(x+1)  Factor out x+1

(x+1) (2x -3) Done!  

C) 3x^2 - 16x - 12   Find two numbers that their product is -36 and their sum is -12. The numbers -18 and 2 works out because -18 times 2 is -36 and -18 plus 2 is -16.

Rewrite the polynomial

3x^2 +2x -18x - 12   GRoup them

 (3x^2 + 2x)   (-18x - 12)   Factor them

x (3x +2) -6(3x +2)  Factor out 3x+2

(3x+2) (x -6)  Done !

6 0
3 years ago
What is the leading coefficient in the quadratic below?<br> h(x)=-2x2+5x+10
Mars2501 [29]

Answer:

-2

Step-by-step explanation:

The leading coefficient in a polynomial is the coefficient that corresponds with the highest degree term. In this case, -2 is the leading coefficient since its term has x² as the highest degree of the quadratic.

5 0
2 years ago
If x -9 is a factor of x^2 -5 -36, what is the other factor?
tatuchka [14]

Answer:

Factors are (x-9)(x+4)

Step-by-step explanation:

6 0
3 years ago
Use the Distributive Property to multiply.) -4x(x - 7)*
ad-work [718]

Answer:

-4x^2-28x

Step-by-step explanation:

Distribute

-4x(x) and -4x(-7)

-4x^2 and -28x

5 0
3 years ago
Read 2 more answers
A bird was sitting 8 meters from the base of an oak tree and flew 10 meters to reach the top of the tree. How tall is the tree?
alina1380 [7]
100=64-x^2
36=x^2
X=6 meters
5 0
2 years ago
Read 2 more answers
Other questions:
  • What is m∠GDC? Explain
    5·1 answer
  • Using tje logarithm find the square of 86.46​
    8·1 answer
  • Similarity - Item 33751 Select the two figures that are similar to each other. help pls​
    8·1 answer
  • Round to the nearest tenth , if necessary.<br><br> 65% of 186 =
    6·2 answers
  • Bobby has been driving at a constant speed for the last 2 hours. If Bobby traveled 150 miles within the 2 hours, what is his con
    5·1 answer
  • A salesman earns $250 per week PLUS a 10% commission on all sales over $5000. In one week, his sales totaled $14,000. What were
    12·1 answer
  • b) The average age of Bishwant. Pujan. Tanus and Salon is 11 years. If the of the first three children are 10 years, 14 years an
    14·1 answer
  • Write the sentence as an equation,<br><br> Four times the difference of -10 and 3 amounts to -52.
    10·1 answer
  • PLEASE HELP WITH STEPS 25 POINTS!!!!<br> Simplify
    12·1 answer
  • The y-coordinated is zero and the x-coordinate is negative. Is the point in Quadrant II? Explain​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!