1.

In triangles PQR, right angled atQ, PQ = 3cm and PR = 6cm.Determine angle QPR.​

Answer»

ong>Answer:

in triangle PQR,

PR is HYPOTENUSE and PQ is ADJACENT

cos THETA= adjacent/hypotenuse =PQ/PR

cos theta =3/6=1/2

cos theta=1/2

THEREFORE theta =60°(cos 60°=1/2)

therefore, angle QPR=60°



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