2 years ago

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

Mathematics

1 answer:

Valentin [98]2 years 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°

You might be interested in

What is the value of the expression (-7)(3)-(5)-3)?

balandron [24]

Answer:

Step-by-step explanation: -81

3 0

3 years ago

Read 2 more answers

9,3,1, what is the sequence and what is it equal to?

Thepotemich [5.8K]

Answer: the sequence is to divide by 3 and it gets smaller and smaller by dividing by three I don't think there is an end to it.

Step-by-step explanation:

9/3=3

3/3=1

1/3=1/3

1/3/3=1/9

1/9/3=1/27

1/27/3=1/81

and I think you know what I mean by now right?

3 0

3 years ago

When a fraction of 12 is taken away from 17, what remain exceed one-third of seventeen by six.

vova2212 [387]

X - the fraction

$17- 12x=\frac{1}{3} \times 17+6 \\
17-12x=\frac{17}{3}+6 \\
-12x=\frac{17}{3}+6-17 \\
-12x=\frac{17}{3}-11 \\
-12x=\frac{17}{3}-\frac{33}{3} \\
-12x=-\frac{16}{3} \\
x=-\frac{16}{3} \times (-\frac{1}{12}) \\
x=\frac{16}{36} \\
x=\frac{4}{9}$

The fraction is 4/9.

5 0

3 years ago

What is the relationship between the segment pq and p’q’

worty [1.4K]

Answer:

the parallel lines match up, and the angles are the same

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

If Janis and Melanie make bracelets one afternoon during Choice time. They make six bracelets each. They feel generous and give

dusya [7]

3 each left. Hope it helped

5 0

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