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Yuav ua li cas koj siv trigonometric ratios mus nrhiav sab lengths?
Yuav ua li cas koj siv trigonometric ratios mus nrhiav sab lengths?

Video: Yuav ua li cas koj siv trigonometric ratios mus nrhiav sab lengths?

Video: Yuav ua li cas koj siv trigonometric ratios mus nrhiav sab lengths?
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Nyob rau hauv txhua txoj cai angled daim duab peb sab, rau txhua lub kaum sab xis:

  1. Cov sib ntawm lub kaum sab xis = lub ntev ntawm qhov opposite sab . tus ntev ntawm lub hypotenuse.
  2. Lub cosine ntawm lub kaum sab xis = lub ntev ntawm qhov uas nyob ib sab sab . tus ntev ntawm lub hypotenuse.
  3. Lub tangent ntawm lub kaum sab xis = lub ntev ntawm qhov opposite sab . tus ntev ntawm qhov uas nyob ib sab sab .

Ntawm no, yuav ua li cas koj paub qhov twg trigonometric piv siv?

Muaj peb kauj ruam:

  1. Xaiv qhov trig ratio siv. - Xaiv qhov kev txhaum, cos, lossis tan los ntawm kev txiav txim siab sab twg koj paub thiab sab twg koj tab tom nrhiav.
  2. Hloov.
  3. daws.
  4. Kauj ruam 1: Xaiv qhov twg trig piv siv.
  5. Kauj Ruam 2: Hloov.
  6. Kauj Ruam 3: daws.
  7. Kauj ruam 1: Xaiv tus trig piv siv.
  8. Kauj Ruam 2: Hloov.

Tom qab ntawd, lo lus nug yog, ua li cas koj pom lub kaum sab xis uas ploj lawm? Txhawm rau txiav txim siab ntsuas qhov tsis paub lub kaum sab xis , nco ntsoov siv tag nrho cov lej ntawm 180 °. Yog ob lub kaum sab xis muab, ntxiv rau lawv ua ke thiab rho tawm ntawm 180 °. Yog ob lub kaum sab xis yog tib yam thiab tsis paub, rho tawm cov paub lub kaum sab xis ntawm 180 ° thiab ces faib los ntawm 2.

Tsuas yog SOH CAH TOA yog dab tsi?

SOHCAHTOA . Ib txoj hauv kev ntawm kev nco qab yuav ua li cas suav cov sine, cosine, thiab tangent ntawm lub kaum sab xis. SOH sawv cev rau Sine sib npaug sib npaug sib npaug ntawm Hypotenuse. CAH sawv cev rau Cosine sib npaug ntawm Adjacent tshaj Hypotenuse. TOA sawv cev rau Tangent sib npaug sib npaug sib npaug tshaj Adjacent.

Kuv yuav ua li cas thiaj nrhiav tau qhov ntev ntawm daim duab peb sab?

Hauv txoj cai no daim duab peb sab , koj tau txais kev ntsuas rau lub hypotenuse, c, thiab ib ceg, b. Lub hypotenuse yeej ib txwm rov qab lub kaum sab xis thiab nws yog qhov ntev tshaj plaws sab ntawm daim duab peb sab . Rau nrhiav tus ntev ntawm ceg a, hloov qhov paub qhov tseem ceeb rau hauv Pythagorean Theorem. daws rau a2.

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