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fiasKO [112]
4 years ago
10

Evaluate the expression using an appropriate double angle formula.. cos^2(15) - sin^2(15)

Mathematics
1 answer:
riadik2000 [5.3K]4 years ago
7 0
Cos²(15°) - sin²(15°) = cos(15° * 2) = √(3/2 so this is the answer by using apropriate formula  double angle identity
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Evaluate the expression. simplify your answer. 2/3 x 1/4 / 4/5
Arturiano [62]

Answer:

The answer is 5/24.

Step-by-step explanation:

2/3 multiplied by 1/4 is 2/12 which simplifies to 1/6. CCF (copy, change, flip) is applied to 4/5 and modifies the equation to become 1/6*5/4 for a final answer of 5/24.

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3 years ago
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son4ous [18]

Step-by-step explanation:

6 men → 4 days → 3 metres

1 man → 24 days → 3 metres

1 man → 8 days → 1 metres

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3 years ago
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A rectangular garden has an area of 46 1/2 square feet. If the garden is 7 1/2 feet long, how many feet wide is it?
Ierofanga [76]

Answer:

The answer is 6 1/5 feet in width.

Step-by-step explanation:

Since the formula for area is <em>wl</em> or <em>width </em>x <em>length</em>, we can utilize our reversive property to find our width by dividing the Area we are given by our length, giving us the missing width in return. Dividing 46.5 square feet by 7.5 feet gives us 6.2 feet, or 6 1/5 feet.

Hope this helps!

5 0
2 years ago
A number y is 5 times the value of a number x. A line graphed in a coordinate plane represents the relationship between x and y.
VLD [36.1K]

Answer:

5

Step-by-step explanation:

If we know that y is 5 times x then we can say for everytime x goes up 1, y goes up 5.

Which comes to the slope of 5/1 which can be simplified to just 5.

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Oduvanchick [21]
I think the answer is c
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3 years ago
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