In △pqr, find the measure of ∡p.
30.4°, 35.9°, 59.6°, 54.1°

Solution:
Since △PQR is a right angled triangle
Sin(∠QPR) = QR/PR (By the known trigonometric ratio sin P = opposite / hypotenuse)
QR = 33.8
PR = 57.6
Sin(∠QPR) = QR/PR
= 33.8/57.6
= 0.5868
∠QPR = sin-1(0.5868)
= 0.6268 radians
= 35.9°
In △pqr, find the measure of ∡p.
Summary:
In △pqr, the measure of ∡p is 35.9°
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