What's the Trick to Proving tan3A=3tanA-tan^3 A/ 1-3tan^2 A?

In summary, difficulty proving identity refers to the challenges individuals face when trying to provide evidence of their identity. Common obstacles include lack of documentation, changes in personal information, language barriers, and inaccessible services for marginalized populations. This can have significant consequences, such as limited access to services, discrimination, and exclusion. To address this issue, policies and procedures can be made more inclusive, alternative forms of identification can be accepted, and scientific research can help identify effective solutions.
  • #1
rhule009
9
0
can anyone help[ me prove the following identity i keep on ending up in a dead end

tan3A=3tanA-tan^3 A/ 1-3tan^2 A
thank you
 
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  • #2
you know that [tex] \tan(A+B) = \frac{\tan A + \tan B}{1-\tan A \tan B} [/tex]. Setting [tex] A = B [/tex] we get [tex] \tan 2A = \frac{2\tan A}{1-\tan A \ tan A} [/tex]. So what is [tex] \tan(A+2A) [/tex]? Thus work from the left to the right.
 
Last edited:
  • #3
i end up with
tanA+2tanA/1-tanAtanAtanA
 
  • #4
what am i doing wrong
 

What is the definition of "difficulty proving identity"?

Difficulty proving identity refers to the challenges that individuals face when trying to provide evidence or documentation to verify their identity. This can occur in various situations, such as applying for a job, opening a bank account, or accessing government services.

What are some common obstacles that contribute to difficulty proving identity?

There can be various factors that make it difficult for individuals to prove their identity. These obstacles may include lack of appropriate documentation, changes in personal information, language barriers, or inaccessible services for marginalized populations.

How can difficulty proving identity impact individuals?

Difficulty proving identity can have significant consequences for individuals, such as limiting their access to essential services, hindering their ability to travel, or even preventing them from obtaining employment or housing. It can also lead to discrimination and exclusion from society.

What can be done to address difficulty proving identity?

Efforts to address difficulty proving identity can include implementing policies and procedures that are more inclusive and considerate of diverse populations. This can involve accepting alternative forms of identification, providing translation services, and simplifying the process for obtaining official documents.

How can scientific research contribute to addressing difficulty proving identity?

Scientific research can play a crucial role in understanding the root causes of difficulty proving identity and identifying effective solutions. By studying the experiences of individuals facing these challenges and evaluating different interventions, scientists can help inform policies and practices that promote greater equity and accessibility.

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