In Android Studio (Java), Write method tan_it and modify the method processPress() to call tan_it() at some point.

tan_it() gives the tangent value of the number entered in.

public static void tan_it(double[] a, int num_vals) { // write the method tan_it. Use Math.tan in this method } public void processPress(View view) throws java.io.IOException { TextView tv; EditText et1; String infilename; tv = (TextView) findViewById(R.id.text_main); tv.setText("Hello everyone. We're in the method. "); // get the values from the EditTexts and // display them et1 = (EditText) findViewById(R.id.edit_infile); infilename = et1.getText().toString(); tv.append("Input file's name is: " + infilename +" "); }