Right triangle trigonometrics

Calculate the size of the remaining sides and angles of a right triangle ABC if it is given: b = 10 cm; c = 20 cm; angle alpha = 60°, and the angle beta = 30° (use the Pythagorean theorem and functions sine, cosine, tangent, cotangent)

Correct answer:

a =  17.3205 cm
C =  90 °

Step-by-step explanation:

b=10 cm c=20 cm a=c2b2=202102=10 3 cm cm=17.3205 cm
α=60  β=30  C=180(α+β)=180(60+30)=90

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