0314andrew 0314andrew

21-02-2021
Mathematics

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In ΔOPQ, p = 38 cm, q = 29 cm and ∠O=39°. Find the length of o, to the nearest centimeter.

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Tsquare58 Tsquare58

21-02-2021

Use law of cosines

o^2=p^2+q^2-2pqCos(C)

o^2=38^2+29^2-38*29Cos(39)

o^2=1444+841-1712.83

o^2=572.17

o=23.92

Say 24 cm

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