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
coldgirl [10]
4 years ago
11

Which of the following are identities? A) sin^2x - cos^2x = 1 . B) sin^2x = 1 - cos^2x . C) tan^2x = 1 + sec^2x . D) cot^2x = cs

c^2x - 1
Mathematics
1 answer:
Aloiza [94]4 years ago
6 0
B ) sin² x = 1 - cos² x
sin² x + cos² x = 1  ( correct )
D ) cot² x =  csc² x - 1
cos²x / sin²x = 1/sin²x - 1 = (1-sin²x) / sin²x = cos²x/sin²x
Identities are B ) and D). 
You might be interested in
How do i respond to my brother....he sent this to me<br> T^T
bonufazy [111]
Say “What the hell did you send me”
6 0
3 years ago
Read 2 more answers
Find all the zeroes of the function f(x)=11x^2+x+5
Rufina [12.5K]

Answer:

x = \frac{1 + \sqrt{(-219)} }{22} , \space  x = \frac{1 - \sqrt{(-219)} }{22}

Step-by-step explanation:

f(x)=11x^2+x+5 is the given equation,

now comparing it with the  standard equation ax^{2} + bx + c = 0, we get

11x^{2} + x + 5 = 0

Here, a = 11, b = 1 and c = 5

Now  by QUADRATIC FORMULA

x =  \frac{-b \pm \sqrt{b^{2} - 4ac}   }{2a}

Now, b^{2}  - 4ac = 1^{2}  - 4 (11) (5) = 1 - 220 = -219

Now as discriminant D < 0, then the roots are imaginary and distinct.

So, roots are x = \frac{-1 + \sqrt{(-219)} }{22} , \space  x = \frac{-1 - \sqrt{(-219)} }{22}

These are the two roots of the given equation.

3 0
3 years ago
Toby buys a new MP3 player for a price of 45.50. What is the total amount hoa credit card is charged if th salea tax is 7%?
GarryVolchara [31]
For sales tax, you just have to multiply the percentage by the number. So you can only have one step, add 1 after you divide the percentage by 100.
45.5•1.07=48.685
The cent only goes to the hundredths, so we have to round.
The total amount is $48.69.
6 0
3 years ago
Which is smallest medium and large​
Ber [7]

Answer: Smallest: 10 pints. Medium: 6 quarts. Largest: 2 gallons.

5 0
4 years ago
Read 2 more answers
Rewrite the polynomial 6x4 − 24x3 + 72x2 by factoring out the GCF
olya-2409 [2.1K]
The trick here is to recognize one or more factors common to each term.  For example,  6x4 − 24x3 + 72x2 = x^2(6x^2 - 24x + 72), so x^2 is one common factor.  Looking at (6x^2 - 24x + 72), you can easily see that 6 is a common factor, so now we have (6)(x^2)(x^2 - 4x + 12).  These last 3 terms do not have a common factor, so the factoring process stops here:

(6)(x^2)(x^2 - 4x + 12)


3 0
4 years ago
Other questions:
  • Provide the missing reason in the following proof.
    14·1 answer
  • What is the measure of ∠G?
    7·2 answers
  • 50 POINTS QUESTION ATTACHED. CHOOSE TWO CORRECT ANSWERS!
    9·1 answer
  • What is 9/16 more than 11/12
    12·1 answer
  • Find the slope of the line passing through the points (-1,8) and (-9,3).
    5·2 answers
  • Be an angel and halp mi pls
    12·2 answers
  • Divide and simplify <br><br>32/15 ÷8/5 ​
    7·1 answer
  • PLEASE HELPPPPP ASAPPP
    14·1 answer
  • I need help for this problem.
    11·2 answers
  • How to solve an inverse operation that has two variables like this
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!