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Tom [10]
3 years ago
12

HELP!!

Mathematics
1 answer:
Leokris [45]3 years ago
6 0

Answer:

1/2

Step-by-step explanation:

Given:

sinx=-1/2

cosy=√3/2

finding x

x=sin^-1(-1/2)

x=-π/6

x=-30°

finding y

cosy=√3/2

y=cos^-1(√3/2)

y=π/6

y=30°

Now finding cos(x-y)

cos(-π/6-π/6)

=cos(-π/3)

=1/2!

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5 0
3 years ago
Read 2 more answers
Find the exact value of cos 157.5°.
Nonamiya [84]
Cos 157.5º=-cos (180º-157.5º)=-cos 22.5=-cos(45/2)

cos Ф/2=⁺₋√((1+cosФ)/2).

In this case 157.5º is in the second quadrant, therefore we use the following equation:
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3 0
3 years ago
The fitness center needs $125,000 in five years for more workout machines. Find the total interest earned if payments are made a
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Answer:

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Step-by-step explanation

Using the compound interest formula

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Substitute

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A = 125000(1+ 0.24)^1.25

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Answer:

Step-by-step explanation:

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