What is the angle of elevation of the sun when a 42 foot mast casts a 16 foot shadow?
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With inverse functions you just swap 'x' and 'y' and solve for 'y'.
Swap 'x' and 'y':
Add 7 to both sides:
Take the square root of both sides:
Swap 'x' and 'y':
Add 7 to both sides:
Take the square root of both sides: