Math, asked by justin58, 1 year ago

In triangle PQR ,right angled at Q ,PQ=3 cm and PR=6cm.Determine angle QPR and angle PRQ.

Answers

Answered by kalpana2164

PR is hypotenuse
sin 30 is 1/2
here it is like that so angle R is 30
and angle P will be 60

i hope it will help you

justin58: i have just started this chapter

justin58: i want to ask why did we took sin30 only

kalpana2164: becoz 3/6=1/2 and it is sin 30 so i took it. you have to find the ratio and then see what is it match with.

kalpana2164: i hope u understand it

justin58: thanks once again

Answered by Anonymous

$\large\sf{Given,}$

$\longrightarrow$ $\large\sf{PQ=3cm\:and\:PR=6cm}$

$\large\sf{Therefore,}$

$\longrightarrow$ $\large\sf{\frac{PQ}{PR}=sinR}$

$\large\sf{or\:sinR=\frac{3}{6}=\frac{1}{2}}$

$\large\sf{So,\angle{PRQ=30°}}$

$\large\sf{and,therefore,\angle{QPR=60°}}$

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