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VLD [36.1K]
1 year ago
13

What is tan 45°? 1 45° 90° A. 1/2 B. 1 C. 1/√2 D. √2 √₂ 2 45°​

Mathematics
1 answer:
polet [3.4K]1 year ago
5 0

Answer:

1

Step-by-step explanation:

tan 45 = cos 45 / sin 45.

Since sin(x)=cos(90-x), cos 45 = sin 45, so tan 45 = 1

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Find the sum of first 20 to terms of an ap in which d is equal to 7 and 20 second term is 149​
GuDViN [60]

Answer:

1370

Step-by-step explanation:

<h3>Given</h3>
  • AP with d= 7 and a₂₂ = 149
<h3>To find</h3>
  • Sum of first 20 terms
<h3>Solution</h3>

<u>First, let's get the value of the first term:</u>

  • aₙ = a + (n-1)d
  • a₂₂ = a + 21d
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  • a = 149 - 147
  • a= 2

<u>Next, let's find the sum of the first 20 terms</u>

  • Sₙ = 1/2n(2a+ (n-1)d)
  • S₂₀ = 1/2*20(2*2 + 19*7) = 10(4 + 133) = 10*137 = 1370

<u>Answer is</u> 1370

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3 years ago
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You spend $4.50 on 5 pounds of apples. What is the unit rate in dollars per pound?
vredina [299]

Answer:

$0.90 per pound.

Step-by-step explanation:

4.50:5

5/5=1

4.50/5=0.90

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3 years ago
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A 12 ft ladder is leaning against a wall with an angle of elevation of 31.2 degrees. How high up the wall will the ladder reach?
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Answer:

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Step-by-step explanation:

sister ,we can use the law of sines. since we have the angle of elevation and assume the wall makes a right  angle with the ground, our angle opposite the ground is 180-[90+23=67

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Step-by-step explanation:

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