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Likurg_2 [28]
3 years ago
14

What is the exact value of cos(-60°)?​

Mathematics
2 answers:
vladimir1956 [14]3 years ago
8 0
Cos (-60) = 1/2

If you look at the cosine graph below you can see the black line pointing at 60 degrees is at 0.5, which is 1/2

Afina-wow [57]3 years ago
4 0

Answer: 1/2

Step-by-step explanation:

cosine=adjacent/hypotenuse

Cos (-60)=1/2

This is a special triangle

see below as the ratio of each side

Hope this helps!! :)

Please let me know if you have any question

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6 0
3 years ago
There are white, and red boats in a marina. Two-thirds of the boats in the marina are white, 4/7 of the remaining boats are blue
Over [174]

Answer:

105 boats

Step-by-step explanation:

Let x be the total number of boats in the marina.

If Two-thirds of the boats in the marina are white.

Fraction of the remaining boat= 1-⅔ =⅓

4/7 of the remaining boats are blue.

4/7 of ⅓ are blue

4/7 X ⅓ = 4/21 are blue

Fraction of Red Boats =

1-(Proportion of white Boats +Proportion of Blue Boats)

= 1-(2/3+4/21)=1/7

If there are 15 red boats,

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1/7 X x=15

x=15X7

x=105

There are 105 boats in total on the marina

8 0
3 years ago
Simplify the ratio 49:35
Andreyy89
7:5 There's your answer :)
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Answer:

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