4 years ago

Verify the identity sin^2(x/2)=(1-cosx)/2

Mathematics

1 answer:

horsena [70]4 years ago

5 0

Use the following identity:

cos(2x)=1-2sin^2(x)

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Steve started with $250 and spent $25 per week. Chelsea started with $30 and saved $30 per week. Use x for time and y for saving

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Steve and Chelsea will have the same amount of money on the 12 week. I can’t graph it but I am a little sure that is the answer

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3 years ago

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Please help, thank you!

DochEvi [55]

we know angle RLP= 100⁰

also

angle RLP+ angle RLB=180⁰(Linear pair)

=>100⁰+angleRLB= 180⁰

=> angle RLB=80⁰

since BR and LR are equal, angle RBL and angle RLB are equal

therefore angle RBL is also equal to 80⁰

using angle sum property of triangles we know that the sum of all angles in a triangle is equal to 180⁰

=>angle BRL+angle RBL+angle RLB= 180⁰

=> angle BRL+80⁰+80⁰=180⁰

=>angle BRL = 180⁰-160⁰

=>angle BRL= 20⁰

I'm sorry it took me some time I'm a slow typer

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3 years ago

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Leonard earns $8.75 per hour working at a bowling alley. Last weekend, he worked for 5.4 hours. How much money did Leonard earn

sertanlavr [38]

Answer:

$47.25

Step-by-step explanation:

Earnings = (rate of pay)(number of hours worked)

Here,

Earnings last weekend = ($8.75/hr)(5.4 hrs) = $47.25

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A harris poll found that 35% of people said that they drink a caffeinated beverage to combat midday drowsiness. a recent survey

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No it's not believable.

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4 years ago

Koda is solving 13 × 16. He used an area model to help work through each step. Which calculation did Koda make to get the highli

Anastasy [175]

Step-by-step explanation:

Since we have given that

Koda is solving

$13\times 16$

According to question, he used an area model to help work through each step.

So, it can be written as

$13=10+3\\\\16=10+6$

so, Let the length will be

$13=10+3$

Let the breadth will be

$16=10+6$

So, area will be

$l\times b\\\\=(10+3)\times (10+6)\\\\=10(10+6)+3(10+6)\\\\=10\times 10+10\times 6+3\times 10+3\times 6\\\\=100+60+30+18\\\\=208$

So,

13×16=208

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4 years ago

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