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gayaneshka [121]
3 years ago
10

HELP!! TRIG LAW OF COSINES

Mathematics
1 answer:
vivado [14]3 years ago
4 0

Answer:

C ≈ 95.7°

Step-by-step explanation:

Law of cosines:

c² = a² + b² − 2ab cos C

where a, b, and c are the sides of the triangle, and C is the angle opposite of side c.

9² = 5² + 7² − 2(5)(7) cos C

81 = 25 + 49 − 70 cos C

81 = 25 + 49 − 70 cos C

7 = -70 cos C

-1/10 = cos C

C ≈ 95.7°

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What is the HCF of two consecutive numbers?
Luba_88 [7]

Answer:  The HCF o two consecutive numbers is always one.

Step-by-step explanation: The reason behind this is that the two consecutive numbers do not have any common factor other than 1. Hence 1 becomes the highest common factor between two consecutive numbers

please mark brainliest

6 0
3 years ago
I need help!!!!!!!!!!!!!!!!!!!!!!
Vlad [161]

Answer:

the answer is D because it 27 i not a perfect square 25 and 36 were the correct numbers to chose and 25 was correct to evaluate  



3 0
3 years ago
Determine wether 16 is the perfect square show proof
enot [183]

Answer:

Therefore, the square root of 16 is an integer, and as a consequence 16 is a perfect square.

As a consequence, 4 is the square root of 16.

Step-by-step explanation:

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 16 is 4.

Therefore, the square root of 16 is an integer, and as a consequence 16 is a perfect square.

As a consequence, 4 is the square root of 16.

5 0
4 years ago
I am just completely lost and am unsure of how to approach this problem.
Anastasy [175]

Answer:

68°

Step-by-step explanation:

As BA⊥BD, so ∠ABD = 90°

also, ∠ABD = ∠CBD + ∠ABC

⇒ 90° = 4x + 52° + 8x - 10°

⇒  12x = 48°

⇒  x = 4°

now,

∠CBD = 4x + 52°

          = 4(4°) + 52°

          = 68°

5 0
3 years ago
Tim has 5 apples and three bags with 8 apples in each bag. How many apples does Tim have in all.
Alex
 5+ 3 x8= 5 + 24= 29 apples overall
8 0
3 years ago
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