(2cos^2 45degree + tan^2 60 degree) -6(sin^2 45degree -tan^2 30 degree) =6
Answers
The history of scientific thought about the formation and evolution of the Solar System began with the Copernican Revolution. The first recorded use of the term "Solar System" dates from 1704.[1][2] Since the seventeenth century, philosophers and scientists have been forming theories concerning the origins of our Solar System and the Moon and attempting to predict how the Solar System would change in the future. René Descartes was the first to hypothesize on the beginning of the Solar System; however, more scientists joined the discussion in the eighteenth century, forming the groundwork for later theories on the topic. Later, particularly in the twentieth century, a variety of theories began to build up, including the now-commonly accepted nebular hypothesis.