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iragen [17]
3 years ago
5

If sin is 3/4 and tan is -3/4, then cos is ?

Mathematics
1 answer:
nadya68 [22]3 years ago
3 0

Answer:

cos=1

Step-by-step explanation:

Use the acronym SOH-CAH-TOA

sin = \frac{3}{4}

So opposite is 3 and hypotenuse is 4.

tan = \frac{-3}{4}

So opposite is -3 and adjacent is 4.

cos = adjacent/hypotenuse

cos = \frac{4}{4}=1

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The area of a rectangular wall of a barn is 32 square feet. It’s length is 4 feet longer than the width. Find the length and wid
Gnom [1K]

Answer:

Step-by-step explanation:

Givens

Area = L * w

w = x

l = x  + 4

Area = 32

Solution

32 = x(x + 4)

32 = x^2 + 4x

x^2 + 4x - 32

(x + 8)(x - 4)

Only x - 4 is going to make any sense

x - 4 = 0

x = 4

The width is 4

The length is 4 + 4 = 8

4*8 = 32 which is the area.

6 0
3 years ago
What’s The greatest common factor for 28 42 and 56
Aliun [14]

Answer:

The answer is 14

Step-by-step explanation:

14x2=28

14x3=42 so the greatest common factor is 14

7 0
3 years ago
Does anyone know how to do this?
eduard

Answer:

on 60!! Hope this help's

Step-by-step explanation:

6 0
3 years ago
A sign in front of a roller coaster says "You must be 60 inches tall to ride." What percentage of this height is 36 inches? *
bonufazy [111]

Answer:

60%

Step-by-step explanation:

36/60 x 100= 60%

8 0
3 years ago
On a trip, a motorist drove 150 miles in the morning and 50 miles in the afternoon. His average rate in the morning was twice hi
Lina20 [59]

Answer:

Morning's average rate = 50 mph, and Afternoon's average rate = 25 mph.

Step-by-step explanation:

Suppose he drove 150 miles for X hours, then his average rate in the morning was (150/X) mph.

Given that he spent 5 hours in driving.

And he drove 50 miles for (5-X) hours, then his average rate in the afternoon was 50/(5-X) mph.

Given that his average rate in the morning was twice his average rate in the afternoon.

(150/x) = 2 * 50/(5-x)

150/x = 100/(5-x)

Cross multiplying terms, we get:-

150*(5-x) = 100*x

750 - 150x = 100x

750 = 100x + 150x

750 = 250x

x = 750/250 = 3.

It means he spent 3 hours in the morning and 2 hours in the afternoon.

So morning's average rate = 150/3 = 50 mph.

and afternoon's average rate = 50/(5-3) = 25 mph.

8 0
3 years ago
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