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Neko [114]
2 years ago
10

Sin10°-cos10° product and evaluate​

Mathematics
2 answers:
Elena-2011 [213]2 years ago
8 0

\\ \sf\longmapsto sin10°-cos10°

\\ \sf\longmapsto sin(90-10°)-cos10°

  • sin(90-A)=cosA

\\ \sf\longmapsto cos10-cos10

\\ \sf\longmapsto 0

Montano1993 [528]2 years ago
6 0

Question should be sin 20 cos 10 + cos 20 sin 10

remember sin (a+b) = sin a cos b + cos a sin b ?

sin 20 cos 10 + cos 20 sin 10

= sin (20+10)

= sin 30

= 1/2

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Alyana needs to buy a piece of glass to cover the top of a circular table. The table has a diameter of 24 inches. How much glass
Firdavs [7]

Answer:

452.16 inches²

Step-by-step explanation:

→ Write circle area formula

π × r²

→ Substitute in the numbers

3.14 × 12²

→ Simplify

452.16 inches²

6 0
3 years ago
Teri invested $1500 in an account with an interest rate of 2.25% compounded continuously. How long will it take for Teri's accou
tester [92]

It will take 54 days for Teri's account to earn an amount of $5000.

<h3>What is compound interest?</h3>

Compound interest, also known as interest on principal and interest, is the practice of adding interest to the principal amount of a loan or deposit.

It occurs when interest is reinvested, or added to the loaned capital rather than paid out, or when the borrower is required to pay it, so that interest is generated the next period on the principal amount plus any accumulated interest. In finance and economics, compound interest is common.

It is given by formula

A = p*e^{r*t}

where:

A is final amount

p is principal amount

r is rate of interest and

t, is time period

Given: A= $5000, p=$1500, r=2.25% = 0.0225

To find: time period to get compounded amount

5000=1500×e^{0.0225*t}

e^{0.0225t} = \frac{10}{3}

0.0225t = ㏑ (\frac{10}{3})

t = 53.5099 ≈ 54 days  

Learn more about compound interest here:

brainly.com/question/3989769

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7 0
1 year ago
Find a quadratic polynomial whose sum and and product is -7 and -2
vampirchik [111]

Answer:

<h2>x²+7x-2 = 0</h2>

Step-by-step explanation:

The general form of a quadratic equation with roots a and b is expressed as shown;

x²-(sum of root) x + (product of roots) = 0

x² - (a+b)x + ab = 0 ... 1

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Product of roots ab = -2

Substituting this values in equation 1 above wil give;

x²-(-7)x+(-2) = 0

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The resulting quadratic polynomial is x²+7x-2 = 0

3 0
3 years ago
Quick answer this question whoever gives correct answer gets brainliest
liq [111]

Answer:

50 envelopes for 2.49

Step-by-step explanation:

2.49/50= .05

5.50/90= .06

 the first per is less than the 90 envelopes one therefore the answer is 50 for 2.49

8 0
2 years ago
A circle with circumference 6 has an arc of 60 degrees central angle. What is the length of the arc
nata0808 [166]
The length of the arc is 1.06m. hope that helps!
7 0
3 years ago
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