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Vikentia [17]
2 years ago
8

If sin θ=4/5 and 90°<θ<180°, what is cos θ?

Mathematics
1 answer:
34kurt2 years ago
7 0

Answer:

Cos ∅ = 3/5

BUT COSINE IS NEGATIVE IN THE SECOND QUADRANT.

Thus cos∅= -3/5

You might be interested in
Compute the number of vinyl tiles, measuring 28 inches on each side, needed to tile a kitchen measuring 102 ft. by 18 ft.
ratelena [41]

Answer:

338 tiles

Step-by-step explanation:

First, convert the measurements of the kitchen from feet to inches by multiplying each measurement by 12.

102 * 12 = 1224     18 * 12 = 216


Now multiply these answers together.

1224 * 216 = 264,384 square inches


Now find the area of the vinyl tiles.

28 * 28 = 784 square inches


Now find how many 784 square inch tiles are needed to cover a 264,384 square inch kitchen.

264,384 / 784 = 337.224


Since you can't buy part of a tile, round your answer up.

338 tiles



6 0
3 years ago
Read 2 more answers
7m-17=60 solve one and two step equation
lord [1]

Answer:

11

Step-by-step explanation:

Hope it helps you :)

5 0
2 years ago
Read 2 more answers
A submarine traveling 200 meters below the surface of the ocean increases its depth by 45 meters. Adam says that the new locatio
melisa1 [442]

Adam made an error of 400 meters

Explanation:

Since, submarine traveling 200 meters below the surface of the ocean

and when the depth increases by 45 meters then submarine new location is

200+45=245 meters below from the surface of ocean.

But Adam says that new location is at -155 meters.

So, error is,   245-(-155)=400 meters

Learn more:

https://brainly.in/question/13000874

8 0
2 years ago
Divide 7/24 by 35/48 and reduce the quotient to the lowest fraction
Ahat [919]
Well, an easier way than to divide fractions is to multiply the fractions, but to do that, flip the numerator and denominator for the second fraction.
For example, it becomes:    7               48          2
                                      --------   ×     --------  = ---------  (top×top & bottom×bottom)
                                        24              35           5

Answer is: 2/5
5 0
3 years ago
B
Tom [10]

Answer:

(a) 320 cm²

(b) 75 cm³

Step-by-step explanation:

The scale factor from A to B is 8/4 = 2.

The scale factor of the areas is 2² = 4.

The scale factor of the volumes is 2³ = 8.

(a)

80 cm² * 4 = 320 cm²

(b)

600 cm / 8 = 75 cm³

8 0
2 years ago
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