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LenKa [72]
4 years ago
15

Simplify the expression using sum or difference identities cos(12)cos(-3)-sin(12)sin(-3)​

Mathematics
2 answers:
katen-ka-za [31]4 years ago
8 0

Answer:

when you simplify the answer is -0.91113026

Step-by-step explanation:

Alecsey [184]4 years ago
7 0

Answer:

\cos(12)\cos(-3)-\sin(12)\sin(-3)​=0.98

Step-by-step explanation:

Given : Expression \cos(12)\cos(-3)-\sin(12)\sin(-3)

To find : Simplify the expression ?

Solution :

Expression \cos(12)\cos(-3)-\sin(12)\sin(-3)

We know the trigonometry identity,

\cos A\cos B-\sin A\sin B=\cos (A+B)

Here, A=12 and B=-3

\cos(12)\cos(-3)-\sin(12)\sin(-3)=\cos(12+(-3))

\cos(12)\cos(-3)-\sin(12)\sin(-3)=\cos(12-3)

\cos(12)\cos(-3)-\sin(12)\sin(-3)​=\cos(9)

From calculator, \cos 9=0.98 in degrees.

Therefore, \cos(12)\cos(-3)-\sin(12)\sin(-3)=0.98

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Answer:

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4 years ago
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2 years ago
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Answer:

The probability of this occurring is 1/7

Step-by-step explanation:

Okay, here is a probability question.

From the question, we can identify the following;

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Now, for the left foot, we are having white sock here.

Kindly recall that since we already have a sock on the right foot, we have 7 socks left to pick from.

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Step-by-step explanation:

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3 years ago
I need help with this
SSSSS [86.1K]

Answer:

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Step-by-step explanation:

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