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1 year ago

COSINE LAW: Solve triangle PQR. round angles to the nearest tenth

Mathematics

1 answer:

Valentin [98]1 year ago

4 0

Answer:

Hi,

Step-by-step explanation:

PR²=PQ²+QR²-2*PQ*QR*cos(51°)

=15²+12²-2*15*12*cos(51°)

=142,444659....

PR=11.9350...

PQ²=QR²+PR²-2*QR*PR*cos(R)

cos(R)=(12²+142.444...-15²)/(2*12*11.9350...)=0,21451112....

angle R=77,61315...°≈77.6°

angle P=180°-51°-77.6°≈51,4°

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Step-by-step explanation:

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2 years ago

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Answer:

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Step-by-step explanation:

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To convert a number into scientific notation, move the decimal point to the left or right until there is one digit before the decimal point.

The number of times you have moved the decimal point is the power of 10 ( $n$ ).

If the decimal point has moved to the left, the power is positive.

If the decimal point has moved to the right, the power is negative.

To convert the given number to scientific notation

The decimal point for the given number 299000000 is after the last zero:

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Move the decimal point 8 places to the left:

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1 year ago

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Answer:

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3 years ago

COSINE LAW: Solve triangle PQR. round angles to the nearest tenth​

COSINE LAW: Solve triangle PQR. round angles to the nearest tenth