Thursday, November 16, 2006
posted by Haiyan at 12:38 p.m.
In yesterday's class we learned how to find a side of two right triangles using trigononetry.

S - sine
O - opposite
H - hypotenuese

C - cosine
A - adjacent
H - hypotenuese

T - tangent
O - opposite
A - adjacent

Find CD ( Hint: Fist find W )

tan 60 =W/2
(2)tan 60=W
W=3.5 cm

tan 60 =X/3.5
(3.5)tan 60=X
X=6.1 cm

Therefore CD=6.1 cm

Angle of Elevation

The angle between the line of sight and the horizontal.

Angle of depression

Homework:Exercise 17

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