trigonometric equation

👨🏻‍🏫 學術台數學

☆ 天與空 ★ ◤

2007-01-21 12:18 am

solve the following,,,where 0 is less than or equal to B is less than 360

3 (tan^2)B -1 = 0

更新1:

where 0 ((

更新2:

where 0 < B < 360

回答 (1)

myisland8132

2007-01-21 12:24 am

✔ 最佳答案

3 (tan^2)B -1 = 0
(tan^2)B=1/3
tanB=1/√3 or tanB=-1/√3
when
tanB=1/√3
B=30, 210
when
tanB=-1/√3
B=150 or 330
So
B=30,150,210,330

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