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55:19
Which equation can be solved to find one of the missing side lengths in the triangle?
a
B
60°
b
12 units
А
O cos(609) = 12
O cos(60°) =
12
b
cos(609) =
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Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/XzW3SUN

Step-by-step explanation:

Use  the mnemonic  SOH CAH TOA to help remember how the sin, cos, and tan functions fit on a triangle

Tan = Opp / Adj

so for this triangle then   Tan(30) = 5 / b  is correct  :)