Need help quick plz. thank you.? (Circle)?

👨🏻‍🏫 學術台數學

iv23361512

2008-11-29 12:35 am

Someone plz solvie this question without using the tan,sin,cos formula,
thank you :)
http://img408.imageshack.us/img408/6375/76963909yd4.png

更新1:

ignore the two way, i only need 1 way to solve it (Don't use sin, cos , tan formula)

更新2:

tell me If it is possible to solve it without using sin, cos , tan formula

回答 (1)

[匿名]

2008-11-29 8:01 am

✔ 最佳答案

unless there is a 90 degree angle missing from between the 18cm line and the radius (i.e. then you could use pythagoras), then no, you will need sohcahtoa.
radius(opp) = 12 sin55, or
radius(opp) = 18 tan55.

sorry

good luck

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