In triangle PQR , angleQ=90 , PQ=3cm , PR=6cm . Find angleP and angleR
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Q=90, PQ= 3cm, PR= 6cm
sin P = 3/6 =1/2 then P= 30°;
cosR = 3/6 =1/2 then R=60°. To test whether the answer is right you may use the angle sum property of a triangle
angleQ + angleR= 180=>
P+R = 180-Q=>
30+60= 90
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