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spayn [35]
3 years ago
7

If the sin 60 degrees is the square root of 3 over 2 then the cos____degrees =____

Mathematics
2 answers:
Mrac [35]3 years ago
6 0
If Sin 60 = √3 / 2

Then, Cos 60 = ?

Well, we know :

Sin^2x + Cos^2x = 1

Let X = 60°

That is,

Sin^2(60) + Cos^2(60) = 1

(√3 / 2)^2 + Cos^2(60) = 1

3 / 4 + Cos^2(60) = 1

Cos^2(60) = 1 - 3/4

Cos^2(60) = 4/4 - 3/4

Cos^2(60) = (4-3)/4

Cos^2(60) = 1/4

Cos(60) = √(1/4)

Cos(60) = √1 / √4

Cos(60) = 1 / 2

This's answer right to the your question.
Gekata [30.6K]3 years ago
4 0

Answer: it can also be 30°; √3/2

Step-by-step explanation:

i just plugged cos30° into a math website and it gave me the answer. you can always plug it in into a scientific calculator.

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Twice the difference of a number and 9 is equal to three times the sum of the number and 6. Find the number
bezimeni [28]

After modelling the mathematical statement and solving its equivalent mathematical relation, we get x = -36.

<h3>What is Equation Modelling?</h3>

Equation modelling is the process of writing a given mathematical statement in the form of a numeric mathematical expression taking into considerations the operations, constants and other variables.

Given in the question is a number such that twice the difference of a number and 9 is equal to three times the sum of the number and 6.

Assume that the number is x. Now, we will model the equation and solve for x. According to the question, the following mathematical relation represents the statement-

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Therefore, the number is -36.

To solve more questions on Equation modelling, visit the link below-

brainly.com/question/13536824

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