成人快手

Sgilean triantanachdTriantanachd

Cuidichidh triantanachd le cheistean mu thriantain cheart-che脿rnach a鈥 cleachdadh nan co-mheas sine, cosine no tansaint. Cuidichidh SMH CDH TMD (SOH CAH TOA) gus cuimhne a chumail air na foirmlean.

Part of MatamataigTriantanachd

Triantanachd

Ann an triantan ceart-che脿rnach, canar a' hypotenuse ris an taobh mu choinneamh a' che脿irn cheirt.

Ma tha \(x^\circ\) ann an aon dhe na ce脿rnan eile, th猫id againn air na taobhan eile ainmeachadh mar a ch矛 thu san diagram seo.

Triangle x掳 angle. The sides labelled as Hypotenuse, Opposite (to x掳) and Adjacent (to x掳)

Feumaidh fios a bhith agad air na 3 co-mheasan triantanachd seo:

  • sine
  • cosine
  • tansaint

Bidh sinn gan giorrachadh gu:

  • sin
  • cos
  • tan

Seo na tr矛 co-mheasan cudromach:

\(\sin (x^\circ ) = \frac{{\text{mu choinneamh}}}{{\text{hypotenuse}}}\)

\(\cos (x^\circ ) = \frac{{\text{d濒霉迟丑}}}{{\text{hypotenuse}}}\)

\(\tan (x^\circ ) = \frac{{\text{mu choinneamh}}}{{\text{d濒霉迟丑}}}\)

Triangle x掳 angle. The sides labelled as Hypotenuse, Opposite and Adjacent

Bidh cuid a' cumail cuimhne orra leis na ciad litrichean air an son nuair a bhios iad a' smaoineachadh d猫 an co-mheas a chleachdas iad gus ceist fhuasgladh.

Seo na litrichean:

SMH CDH TMD

Sine Mu choinneamh Hypotenuse

Cosine D濒霉迟丑 Hypotenuse

Tansaint Mu choinneamh D濒霉迟丑