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2 years ago

Evaluate the expression cos(30°)=

Mathematics

2 answers:

Ganezh [65]2 years ago

7 0

Step-by-step explanation:

cos 30° is √3 /2

Also refer to the image attached

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alina1380 [7]2 years ago

3 0

Answer:

$cos (30) =\sqrt{\frac{3}{2} } =0.8660$

Step-by-step explanation:

By using the cos square identity in trigonometry i.e., cos2ϴ = 1 – sin2 ϴ, we can evaluate the exact value of cos(33 ). For calculating the exact value of cos(∏/6), we have to substitute the value of sin(30°) in the same formula.

cos(30°) = √1 – sin230°

The value of sin30° is 1/2 (Trigonometric Ratios)

cos(30°) = √1 – (1/2)2

cos(30°) = √1 – (1/4)

cos(30°) = √(1 * 4 – 1)/4

cos(30°) = √(4 – 1)/4

cos(30°) = √3/4

Therefore, cos(30°) = √3/2

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PolarNik [594]

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The complete question is added as an attachment

From the table of values, we have the following points

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m = (y2 - y1)/(x2 - x1)

Substitute the known values in the above equation

m = (-1 -0)/(0 + 1)

Evaluate the exponent

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The equation is then calculated as:

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2 years ago

Write and expression for the difference of p and 4

katen-ka-za [31]

Answer:

p-4

Step-by-step explanation:

It is like asking to write an expression for the difference of 7 and 4: 7 - 4.

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3 years ago

Read 2 more answers

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kirill [66]

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3 years ago

The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $420 to drive 500 mi

djyliett [7]

Answer:

$C(d) = \frac{1}{5}d + 320$

Step-by-step explanation:

Given

$d \to miles$

$C \to cost$

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Required

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Start by calculating the slope (m)

$m = \frac{\triangle C}{\triangle d}$

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Take LCM

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3 years ago

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3 years ago