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Minchanka [31]
3 years ago
13

Need help asap!!! plzz

Mathematics
2 answers:
Leya [2.2K]3 years ago
8 0

Answer:

About 40

Step-by-step explanation:

Evgesh-ka [11]3 years ago
5 0

Answer:

About 40.

Step-by-step explanation:

.27x162 = 43.74

43.7 rounded = 44

44 is below 45 so the answer is (D) about 40.

Hope this helps xoxo

Please mark brainliest

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Find the exact value by using a half-angle identity. sin(5pi/12)
anzhelika [568]

Find <span>tan<span>(<span><span>5π</span>12</span>)</span></span> and sin ((5pi)/12)
Answer: <span>±<span>(2±<span>√3</span>)</span>and±<span><span>√<span>2+<span>√3</span></span></span>2</span></span>

Explanation:

Call tan ((5pi/12) = t. 
Use trig identity: <span><span>tan2</span>a=<span><span>2<span>tana</span></span><span>1−<span><span>tan2</span>a</span></span></span></span>
<span><span>tan<span>(<span><span>10π</span>12</span>)</span></span>=<span>tan<span>(<span><span>5π</span>6</span>)</span></span>=−<span>1<span>√3</span></span>=<span><span>2t</span><span>1−<span>t2</span></span></span></span>
<span><span>t2</span>−2<span>√3</span>t−1=0</span>

<span>D=<span>d2</span>=<span>b2</span>−4ac=12+4=16</span>--> <span>d=±4</span>

<span>t=<span>tan<span>(<span><span>5π</span>12</span>)</span></span>=<span><span>2<span>√3</span></span>2</span>±<span>42</span>=2±<span>√3</span></span>

Call <span><span>sin<span>(<span><span>5π</span>12</span>)</span></span>=<span>siny</span></span>
Use trig identity: <span><span>cos2</span>a=1−2<span><span>sin2</span>a</span></span>
<span><span>cos<span>(<span><span>10π</span>12</span>)</span></span>=<span>cos<span>(<span><span>5π</span>6</span>)</span></span>=<span><span>−<span>√3</span></span>2</span>=1−2<span><span>sin2</span>y</span></span>
<span><span><span>sin2</span>y</span>=<span><span>2+<span>√3</span></span>4</span></span>
<span><span>siny</span>=<span>sin<span>(<span><span>5π</span>12</span>)</span></span>=±<span><span><span>√<span>2+<span>√3</span></span></span>2</span></span></span>

5 0
3 years ago
Jaquavion's grandfather cut 68 1/2 bales of hay from 2 fields. He cut 23 1/4 from 1 field. How many bales did he cut from the ot
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His grandfather cuts 45 1/4 bales of hay in the other field
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3 years ago
HELP DUE IN 15 MINS!
Stells [14]

Answer:

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Step-by-step explanation:

<u>Sum of interior angles of a polygon:</u>

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Sedbober [7]

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Answer:

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Step-by-step explanation:

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y = 8

24 feet = 8 yards

8 yards < 10 yards

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2 years ago
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