Answer :

We have the following triangle

We have the hypotenuse and all the angles so we can use the law of sines

[tex]\frac{a}{\sin(A)}=\frac{b}{\sin(B)}=\frac{c}{\sin(C)}[/tex]

In this case take us a = 4, b = QP andc = RQ

First, we solve QP

[tex]\begin{gathered} \frac{4}{\sin(90)}=\frac{b}{\sin(30)} \\ b=\frac{4}{\sin(90)}\cdot\sin (30) \\ b=2 \end{gathered}[/tex]

Second. we solve RQ

[tex]\begin{gathered} \frac{4}{\sin(90)}=\frac{c}{\sin(60)} \\ c=\frac{4}{\sin(90)}\cdot\sin (60) \\ c=2\sqrt[]{3} \end{gathered}[/tex]

These are the solutions

To check this we can take out the hypotenuse using the Pythagoras theorem and check that

[tex]\begin{gathered} H=\sqrt[]{(2)^2+(2\sqrt[]{3})^2} \\ H=\sqrt[]{4+(4\cdot3)} \\ H=\sqrt[]{4+12} \\ H=\sqrt[]{16} \\ H=4 \end{gathered}[/tex]

This is correct

In conclusion, these answers are:

[tex]\begin{gathered} QP=2 \\ RQ=2\sqrt[]{3} \end{gathered}[/tex]

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Rewritten by : Barada