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3 years ago

Calculate ZQRP 12 cm Р R 18 cm

Mathematics

1 answer:

gladu [14]3 years ago

8 0

Answer:

<QRP = 48.2°

Step-by-step explanation:

Given:

PR = 18 cm

QR = 12 cm

Required:

<QRP = angle R

Solution:

Reference angle = <R (<QRP)

Adjacent side length = 12 cm

Hypotenuse = 18 cm

Thus:

Cos (R) = 12/18

cos (R) = 0.6667

$R = Cos^{-1}(0.6667)$

$R = 48.1871227$

<QRP = 48.2° (nearest tenth)

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