Calculate side DC in this triangle

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SUMMARY

The discussion focuses on calculating the length of side DC in a triangle given the lengths AD (48 cm) and BD (17 cm). Participants confirm that the calculations are correct and suggest using the sine and cosine formulas for verification. Additionally, they recommend checking the calculation using side BC and angle C, which is 42 degrees, as an alternative method to ensure accuracy.

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VitaminK
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Homework Statement
AD=48cm
BD=17cm
Calculate DC
Relevant Equations
Sine formula and cosine formula
1587315528457.png

Was just wondering if someone could take a look at my calculations and see if I've done them correctly.
1587319123492.png
 
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VitaminK said:
Homework Statement:: AD=48cm
BD=17cm
Calculate DC
Relevant Equations:: Sine formula and cosine formula

View attachment 260979
Was just wondering if someone could take a look at my calculations and see if I've done them correctly.
View attachment 260981
That looks fine.

Of course, you could have found length DC using BC, BD, and angle C (the 42° angle). Maybe, use this as a check.
 
SammyS said:
That looks fine.

Of course, you could have found length DC using BC, BD, and angle C (the 42° angle). Maybe, use this as a check.
thanks!
 

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