Ib txwm, ib txwm, lub sine ntawm lub kaum sab xis yog sib npaug rau sab nraud faib los ntawm hypotenuse (opp / hyp hauv daim duab). Cov cosine yog sib npaug rau sab uas nyob ib sab faib los ntawm lub hypotenuse (adj/hyp). Dab tsi yog qhov sine B hauv daim duab? Nco ntsoov opp / hyp: sab nraud yog b thiab hypotenuse yog c, yog li kev txhaum B=b / c.
SEC yog dab tsi ntawm kev txhaum thiab cos?
Secant ntawm x yog 1 faib los ntawm cosine ntawm x: sec x=1 cos x, thiab cov cosecant ntawm x txhais tau tias yog 1 faib los ntawm x: csc x=1 sin x.
Koj qhia li cas txog kev txhaum?
Express Sine in Terms of Tangent
- Pib piv nrog tus lej suav nrog sine, cosine, thiab tangent, thiab muab txhua sab los ntawm cosine kom tau sine ib leeg ntawm sab laug.
- Hloov cosine nrog nws txoj haujlwm sib luag.
- Tiav Pythagorean tus kheej tan2θ + 1=sec2θ rau secant.
- Hloov tus secant hauv qhov sib npaug sine.
txhais li cas ntawm sine?
Lub sine ntawm lub kaum ntse ntse yog txhais nyob rau hauv cov ntsiab lus ntawm ib daim duab peb sab: rau lub kaum sab xis, nws yog qhov sib piv ntawm qhov ntev ntawm sab uas yog qhov sib txawv uas lub kaum sab xis, mus rau qhov ntev ntawm sab ntev ntawm daim duab peb sab (lub hypotenuse). Rau ib lub kaum sab xis, lub sine muaj nuj nqi yog denoted yooj yim li.
COS sib npaug li cas?
Definition of cosine
The cosine of an angle is definition as the sine of the complementary angle. CovLub kaum sab xis sib npaug sib npaug ntawm lub kaum sab xis muab rho tawm ntawm lub kaum sab xis, 90 °. … cos θ=sin (90° – θ). Sau nyob rau hauv cov nqe lus ntawm kev ntsuas radian, qhov no tus kheej ua. cos θ=sin (π/2 – θ).
