Thursday

December 18, 2014

December 18, 2014

Posted by **GoMeGo** on Sunday, May 22, 2011 at 1:05am.

This is due tomorrow.

- Trig -
**Reiny**, Sunday, May 22, 2011 at 8:43amDraw a vector AB , S15°E, showing the boat in still water.

Draw BC, going West, showing the speed of the river.

Join AC , the resultant vector.

By simple calculation of angles,

angle A = 26°

angle B = 75°

angle C = 79°

I see two simple applications of the sine law

for the speed of the river:

a/sin26° = 25/sin75°

a = 25sin26/sin75 = 11.35

for the boat's speed in still water:

c/ain79 = 25/sin75

c = 25.406

**Answer this Question**

**Related Questions**

physics - A river flows toward 90 degrees. A river boat pilot heads the boat at ...

Math: Calculus - Vectors - A boat travels at a speed of 5 m/s in still water. ...

Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...

Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...

Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...

Physics - URGENT - A boat travels at 3.8 m/s and heads straight across a river ...

physics - need help right now. - A boat travels at 3.8 m/s and heads straight ...

physics - A boat travels at 3.8 m/s and heads straight across a river 240 m wide...

Math - A fishing boat leaves port at 11 miles per hour at a bearing of 210 ...

Physics - A motorboat heads due east at 8.5 m/s across a river that flows to the...