sebastianlopez1073
sebastianlopez1073 sebastianlopez1073
  • 25-08-2022
  • Mathematics
contestada

Pls help pefer if you can somewhat explain (Grade 11) (ASAP) (Urgent)​

Pls help pefer if you can somewhat explain Grade 11 ASAP Urgent class=

Respuesta :

evgeniylevi
evgeniylevi evgeniylevi
  • 25-08-2022

Answer:

17) h=I(1-cosθ); 18) h=1.404.

Step-by-step explanation:

17) h=I-BC;

In ΔABC: m(∠C)=90°, m(∠B)=θ, AB=I, then BC=AB*cos(∠B); ⇒ BC=Icosθ;

Then h=I-Icosθ or h=I(1-cosθ).

18) if I=6 and θ=40°, then h=6(1-cos40°)≈6*(1-0.766)=1.404, where cos40°≈0.766.

For more details see the attachment.

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