Write the following complex number in rectangular form. 14 left parenthesis cosine 300 degrees plus i sine 300 degrees right parenthesis Question content area bottom Part 1 The rectangular form of 14 left parenthesis cosine 300 degrees plus i sine 300 degrees right parenthesis is enter your response here. (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize all denominators. Type your answer in the form a plus b i.)