3 years ago

What is the rule for reflecting across the x-axis?

Mathematics

1 answer:

Stella [2.4K]3 years ago

7 0

(x, y) = (x, -y)

The x axis does not change

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In a scale drawing of an apartment 1 centimeter represents 2 3/4 feet. if the length of the kitchens is 4 1/2 cm on the scale dr

rusak2 [61]

Given: 1 cm = 2 3/4 ft ; kitchen length = 4 1/2 cm
2 3/4 = 11/4; 4 1/2= 9/2

11/4 x 9/2 = 99/8 =12 3/8

OR You could use decimals

2 3/4 = 2.75 ; 4 1/2 = 4.5
2.75 x 4.5 = 12.375
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4 years ago

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Given the value of cos 25° ≈ 0.9063, enter the sine of a complementary angle. Use an expression relating trigonometric ratios of

Nookie1986 [14]

Answer:

Cos 25°=Sin65°=0.9063

Step-by-step explanation:

-Complimentary angles generally refer to the two acute angles of a right triangle.

-The two angles add up to 90º.

Let A and B be the two acute angles. Their trigonometric relationship is such that:

$Sin A\textdegree =Cos \ B\textdegree\\\\Cos \ A\textdegree=Sin \ B\textdegree$

Therefore,

The complementary angle of 25° is 65°

Cos 25°=Sin65°=0.9063

7 0

3 years ago