Thursday

August 21, 2014

August 21, 2014

Posted by **Anonymous** on Thursday, May 26, 2011 at 10:28am.

What is the bearing of the plane?

What is the smallest angle of the triangle?

What is the largest angle of the triangle?

What is the remaining angle of the triangle?

What is the ground speed of the plane?

- trig -
**Henry**, Saturday, May 28, 2011 at 11:43amVp=225mi/h@(270-25) + 60mi/h@(270+80).

Vp = 225mi/h@245deg + 60mi/h@350deg.

Vp=(225cos245+60cos350) +

i(225sin245+60sin350).

Vp = (-95.1+59.1) + i(-203.9-10.4),

Vp = -36 - i214.3,

1. tan(Ar) = -214.3 / -36 = 5.95,

Ar = 80.5deg.

A = Ar + 180 = 80.5 + 180 = 260.5deg. =

Direction(bearing).

2. 90 - Ar = 90 - 80.5 = 9.5deg. = smallest angle.

3. 90deg = Largest angle.

4. 90 - 9.5 = 80.5deg.

5. Vp^2 = (-36)^2 + (214.3)^2 = 47,220.49,

Vp = 217.3mi/h.

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