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trigonometry

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an example problem showed the following
log tan A/2 = 9.54435 - 10
A= 38 deg 36' 12"

Now i want to do the same.

log tan A/2 = 9.85551 - 10
A= ??

I don't know how to convert tan into degrees can you help me.

  • trigonometry -

    log tan A/2 = 9.85551 - 10
    log tan A/2 = - 0.14449
    take inverse log
    tan A/2 = 0.716984884
    take inverse tangent
    A/2 = 35.64
    A = 71.28°
    = 71° 16' 48"

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