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Anna71 [15]
3 years ago
12

What is t (cos (t)) = 0?

Mathematics
1 answer:
Tpy6a [65]3 years ago
6 0
In radians:
To get 0, only one part of the multiplication needs to be zero for the whole thing to be zero. Thus we get 2 equations:
t=0, and cos(t)=0
for the first equation, it's pretty self-explanatory and sp we get 0 as one solution.
For the second equation, cos(pi/2) and cos(3pi/2) both equal 0 so both pi/2 and 3pi/2 are answers. Since there is no bound to this problem, the actual answer is:
(2Z+1)pi/2 and 0
(2Z+1) means all odd integers
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The original price of a bicycle is $150. There is 3% sales tax on all purchases. What is the selling price of the bicycle includ
SIZIF [17.4K]

Answer:

(Answer Below)

Step-by-step explanation:

Price Before Taxes - $150.00

+ Sales Tax (3%) - $4.50

Total Price With Tax - $154.50

6 0
2 years ago
Marina had 24,500 to invest. She divided the money into three different accounts. At the end of the year, she had made RM1,300 i
galben [10]

Answer:

See below

Bold parts are important parts. They are the equations.

Marina had RM24,500 to invest.

If the amount of money in the 4% account was four times the amount of money in the 5.5% account.

" At the end of the year, she had made RM1,300 in interest. The annual yield on each of the three accounts was 4%, 5.5%, and 6%."

"If the amount of money in the 4% account was four times the amount of money in the 5.5% account,"

a = 4b

Down is the equations.

let a = amt in the 4% acct

let b = amt in the 5.5% acct

let c = amt in the 6%

"Marina had RM 24,500 to invest."

a + b + c = 24500

Replace a with 4b in both equations, simplify

b = $2000 in the 5.5% investment

a = $8000 in the 4% acct

<em><u>Hope this helps.</u></em>

8 0
3 years ago
Please answer this question correctly and i'll mark you as brainlilest! Thank you.
Liono4ka [1.6K]
C. Acute vertically opposite angles
5 0
2 years ago
A cell phone plan has a monthly cost that is shown in the table below. What is the correct statement regarding the average rate
BARSIC [14]

Answer:

Second from top...

The average rate of change is $0.07, meaning that for each minute of talk time, the monthly bill increases by $0.07.

Step-by-step explanation:

Pick any two points and calculate the slope which will represent the rate of change:

  (Minutes, Cost)

  (0, 9.95)

  (10, 10.65)

Rate of change:

slope m = (y₂ - y₁) / (x₂ - x₁)

             = (10.65 - 9.95) / (10 - 0)

             = 0.7 / 10

             = 0.07

y is cost

m is rate of change

x is minute(s) use

b is fixed monthly cost regardless if any minutes is used

  y = mx + b

  y = .07x + 9.95

4 0
3 years ago
Which of the following statements is true?
saveliy_v [14]

Answer:

The answer is d.

Step-by-step explanation:

As we know, sin x= cos (90°-x)

sin 18° = cos (90°-18°)

= cos 72°.

Similarly, sin 72°= cos (90°-72°)

= cos 18°

But, sin 55°= cos (90°-55°)

= cos 35°

3 0
3 years ago
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