Hi Guys !

Am Currently stuck with this question :

If sin(x+y) = 1 and if tanx = 9tany , find the value of tanx.

Need help guys thanks !

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- Jan 2nd 2011, 07:10 PMliukawaSolving of Trigonometry equation
Hi Guys !

Am Currently stuck with this question :

If sin(x+y) = 1 and if tanx = 9tany , find the value of tanx.

Need help guys thanks ! - Jan 2nd 2011, 07:19 PMpickslides
have you played with the fact that ?

- Jan 2nd 2011, 07:19 PMdwsmith
What if you write

Does this help?

Also, think about what the range of tan(x)? - Jan 3rd 2011, 07:51 AMSoroban
Hello, liukawa!

Quote:

I tried all kinds of gymnastics and got nowhere.

Then my two brain cells got together . . .

Since , then: .

. . That is: .

Then we have:

. .

. . . . I hope you followed that.

Multiply both sides by

Therefore: .

- Jan 3rd 2011, 08:19 AMArchie Meade