Well, darling, if tangent k equals 0.575, then angle k is approximately 29.74 degrees. Just remember to use your trusty calculator and make sure it's in the correct mode before you go crunching those numbers. Happy calculating, honey!
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Tan(k) = 0.575
Then
k = ArcTan(0.575) or so,etimes shown as Tan^(-1) 0.575
k = 29.898... degrees
or
k = 0.52181... radians
90 degrees
1/(tangent of angle)
The sine of an angle is obtained from a right angle triangle. The other two angles are acute, or less than 90 degrees. The sin of the angle is the side opposite the angle divided by the hypotenuse.
.105
with all the sides, you could use any, use SOH :( sin of angle = opposite / hypotonuse)assuming its a right angle triangle, then select either of the (non right angle) angles, divide the length of the side opposite this angle by the length of the hypotonuse ( longest side, opposite the right angle), then find the inverse SIN of this number on your calculator, this is the angle. Since total internal angles always = 180 degrees, and right angle = 90 degrees then final angle is calculated angle subtracted from 90 degrees.