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mars1129 [50]
3 years ago
9

How do you solve law of cosine?​

Mathematics
2 answers:
Iteru [2.4K]3 years ago
8 0

Answer:

Step-by-step explanation:

Use the Law of Cosines when you know the lengths of two sides, and the angle between them. That is not the case here. You know b=24, c=21, and B=61°, but B is not between b and c.

Use the Law of Sines.

sinC/c = sinB/b

sinC = c×sinB/b

C = arcsin(c×sinB/b)

= arcsin(24sin61°)/21)

≈ 49.9°

A = 180° - B - C ≈ 69.1

a/sinA = b/sinB

a = sinA×b/sinB

= sin(69.1°)×21/sin(61°)

≈ 25.6 units

Effectus [21]3 years ago
4 0

Draw and label a standard Oblique Triangle, as we’ve done in our previous lessons.

Determine the given congruence, either SAS or SSS, and pick the equation that helps you solve for either a missing side or angle.

Plug into your chosen equation and solve.

The "Law of Cosines" can be used to calculate one side of a triangle when the angle opposite and the other two sides are known. The "Law of Cosines" can be expressed as c2 = a2 + b2 - 2 a b cos C (1)

The cosine rule is an extension of this mathematic principal that makes it effective for non-right triangles and states that in regard to a certain angle, the square of the side of the triangle opposite that angle is equal to the squares of the other two sides added together, minus two times both..

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swat32

the answer is

x= 8/3


6 0
2 years ago
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Y = x ^3 - 5x² +16x-80
Leokris [45]

Answer:

(x-5)(x^2+16)

3 0
3 years ago
Explanation please <br><br>thank you
GrogVix [38]
300 represents the initial value or the value that you started with.
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8 0
3 years ago
. The new saleswoman at Clocks Unlimited was very good. During her first day on the job she sold at least two of each of the thr
LiRa [457]

Answer:

5

Step-by-step explanation:

Let the number of the kitchen clock sold =a

Let the number of the cuckoo clock sold =b

Let the number of the two-foot high grandfather clocks sold =c

The new saleswoman sold at least two of each of the three models.

Therefore:

a\geq 2\\b \geq 2\\c \geq 2

In all, she collected $300 from selling these models alone

17a+31b+61c=300

17(2)+31(2)+61(2)=218

300-218=82

Next, we try to express the remainder (82) in terms of 17, 31 and 61

82=17(3)+31

Therefore, she sold:

  • 5 kitchen clocks
  • 3 cuckoo clocks
  • 2 two-foot high grandfather clocks

She sold 5 $17 clocks.

CHECK:

17(5)+31(3)+2(61)=$300

4 0
3 years ago
1 minute is equal to 60 seconds. How many seconds are in 4 minutes, 14 seconds?
Svet_ta [14]

Answer:

254 seconds

Step-by-step explanation:

If 1 minute = 60 second

then

60 x 4 = 240 second

then add 14

240 + 14 = 254

Therefore, there are 254 second in 4 minutes and 14 seconds

7 0
2 years ago
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