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November 20, 2014

November 20, 2014

Posted by **brittney** on Sunday, January 8, 2012 at 11:21am.

- trigonometry -
**Henry**, Sunday, January 8, 2012 at 10:13pm1. tanAr = -6/-2 = 3.0,

Ar = 71.6 Deg = Reference angle.

A = 180 + Ar = 180 + 71.6 = 251.6 Deg.

Da = 180 - 71.6 = 108.4 Deg.,CCW =

Direction she should aim her canoe.

2. d = V*t,

t = d/V = (2000/5280) / 2 = 0.1894 h =

11.4 min.

- trigonometry -
**Steve**, Monday, January 9, 2012 at 4:20amThe only problem here is that when drawing your reference triangle, the westward speed was 2 and the downstream speed was 6, so you could take the tangent.

When rowing upstream, the 2 mph speed is along the hypotenuse, She can't row the required 2√10 = 6.32 mph needed to end up with a westward speed of 2 mph.

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