How to evaluate without tables?

Asked by malaysaha.80 | 9th Feb, 2019, 11:38: AM

Expert Answer:

begin mathsize 18px style open parentheses fraction numerator sin space 47 over denominator cos space 43 end fraction close parentheses squared plus open parentheses fraction numerator cos space 43 over denominator sin space 47 end fraction close parentheses squared minus 4 cos squared 45
equals open parentheses fraction numerator sin space open parentheses 90 minus 43 close parentheses over denominator cos space 43 end fraction close parentheses squared plus open parentheses fraction numerator cos space open parentheses 90 minus 47 close parentheses over denominator sin space 47 end fraction close parentheses squared minus 4 cos squared 45
equals open parentheses fraction numerator cos space 43 over denominator cos space 43 end fraction close parentheses squared plus open parentheses fraction numerator sin space 47 over denominator sin space 47 end fraction close parentheses squared minus 4 cos squared 45
equals 2 minus 4 cos squared 45
equals 2 minus 4 open parentheses 1 half close parentheses equals 0 end style

Answered by Arun | 9th Feb, 2019, 02:36: PM