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Trig question a level maths
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If tan(x) = -7/24 and x is obtuse, find the value of tan(x/2)
This may end up being really simple but I’m currently making no progress with it
I was thinking of using one of the trig identities but I’m not too sure
Any help would be appreciated
This may end up being really simple but I’m currently making no progress with it
I was thinking of using one of the trig identities but I’m not too sure
Any help would be appreciated
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#2
(Original post by helloworld121)
If tan(x) = -7/24 and x is obtuse, find the value of tan(x/2)
This may end up being really simple but I’m currently making no progress with it
I was thinking of using one of the trig identities but I’m not too sure
Any help would be appreciated
If tan(x) = -7/24 and x is obtuse, find the value of tan(x/2)
This may end up being really simple but I’m currently making no progress with it
I was thinking of using one of the trig identities but I’m not too sure
Any help would be appreciated
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reply
Report
#3
Since tan(x) is obtuse then it is between 180 and 90. As tan(x)=-7/24, then to find x we do tan^-1(-7/24) which is equal to x so if we do 180 - tan^-1(-7/24) we get the obtuse angle which is x. Now if you keep x as an answer in your calculator then we do tan(ANS/2) which is tan(x/2) and that is your answer.
Tan^-1 is inverse tan.
(Edit: An obtuse angle is between 180 and 90)
Hope this helped
Tan^-1 is inverse tan.
(Edit: An obtuse angle is between 180 and 90)
Hope this helped
Last edited by a0mp; 1 month ago
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#4
(Original post by helloworld121)
If tan(x) = -7/24 and x is obtuse, find the value of tan(x/2)
This may end up being really simple but I’m currently making no progress with it
I was thinking of using one of the trig identities but I’m not too sure
Any help would be appreciated
If tan(x) = -7/24 and x is obtuse, find the value of tan(x/2)
This may end up being really simple but I’m currently making no progress with it
I was thinking of using one of the trig identities but I’m not too sure
Any help would be appreciated
Use tanx in place of tan2x
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