IV. a, A, c

TRIANGLES RECTILIGNES OBLIQUANGLES.

sinB sinC - <

i ,ÿsJ!

~ sin A

sin B = - sin A ,

sin A sin A

„ sin 11 sinC ■x sin A

i(D + C) = 90” — -J A, tangî {B — C) = j-^cot; A,

, sin A (A + c) sin-j- A (A — c ) coa^ A

a - 6 5Sn»--S»i'(B-TT sin{(B-CT’ *-’ 6f8inA -

triangles sphériques rectangles.

eosr = cosasécA,

sin B = coséc a sin A,

cosC = cot a tang A.

cosa = cos A cosr,

tangB = tang A cosécr.

tangC = cosécAtangc.

ginA ae sinasinB,

tangr = tanga cos B,

tangC= sécacotB.

cota = cotA cosC,

Linge = sinA tangC,

cosB — cosAsinG.

cosa = col B cotC,

cosA = cosB coséc C,

cosr = coséc B cosC.

TRIANGLES SPHÉRIQUES RECTILATÈRES.

cosC = — cos A séc B,

sin A = coséc A sin B,

cosr =— cot A tang B

cos A = — cos B cosC,

tang A = LingBcosécC,

tangr = coséc B tangC.