title: header on first page and others
body: <p>a header is created for pages 2+ with fancyhdr but how can you make the same header also appear on the first page?</p>
  
  <p>here is the rmarkdown:</p>
  
  <pre><code>---
  title: "Untitled"
  classoption: landscape
  output: 
    pdf_document:
      number_sections: false
      dev: pdf
      keep_tex: false
      toc: yes
  header-includes:
  - \usepackage{fancyhdr}
  - \pagestyle{fancy}
  - \fancyhead[C]{center text}
  - \fancyhead[R]{right text}
  ---
  
  ```{r setup, include=FALSE}
  knitr::opts_chunk$set(echo = TRUE)
  ```
  
  ## R Markdown
  
  This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see &lt;http://rmarkdown.rstudio.com&gt;.
  
  When you click the **Knit** button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document. You can embed an R code chunk like this:
  
  ```{r cars}
  summary(cars)
  ```
  
  ## Including Plots
  
  You can also embed plots, for example:
  
  ```{r pressure, echo=FALSE}
  plot(pressure)
  ```
  
  Note that the `echo = FALSE` parameter was added to the code chunk to prevent printing of the R code that generated the plot.
  </code></pre>