log tang I

— log C08 1 [(180» - <f ) + t"] = 8.0059651

log tang| [(9? - 9,)+NN'] = 9.9325777

I [(flj e,) + NN'] = 40»,34',13",08

log 8in I [(180» - <p) - f"] = 9.9999664

log lang| (9" - 9) = 9.8434349

log 8in I [(180» - t) + 9l = 9.9999777

log tang i [{9? - 9,) - NNT = 9.8434236

i [(6» 9,) — NN'] = 34»,53',17",90.

On aurait donc, comme ci-dessus,

^'-^=5[(eî-^)+NN^-f-|i(9î-9,)-NN^=75^27^3(r,98.