Use Inverse trig functions to solve for the missing angles
D
8.5
F
E
6.5

Angle <E is approximately 40 degrees, and angle <D is approximately 50 degrees

Step-by-step explanation:

Since angle <F is clearly 90 degrees, we can find angle E using the cosine function that relates the adjacent side to the angle with the hypotenuse:

And we use the sin function to deal with angle <D:

22 dimes and 9 nickels

step-by-step explanation:

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step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse