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April 18, 2014

Homework Help: trigonometry

Posted by y912f on Wednesday, January 7, 2009 at 6:30pm.

please check my answers.
1.Find the area of the sector of a circle.
r=11.8cm, theta-pi/7 radians
I got 31.2cmsquared
2.Find the radius of a circle in which a central angle of pi/6radian determines a sector of area 76square meters.
I got 17.03m
3.Find the measure(in radians) of a central angle of a sector of area 45 square inches in a circle of radius 8 inches.
I need help getting the answer
4.In this question you're suppose to approximate the length by finding the necessary arc length.

A tree 520m away subtends an angle of 4degrees. find the height of the tree.
I also need help on this one
THANKS ALOT

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