find  x if :- sin 47 sec 43 +cos43 cosec 47- cos square 45 ° =0

Asked by 4321sandeep | 16th Oct, 2020, 12:40: PM

Expert Answer:

To find x if sin 47 sec 43 + cos43 cosec 47 - x cos square 45° = 0
 
sin 47 space sec 43 space plus space cos 43 space cosec 47 space minus space xcos squared 45 equals 0
rightwards double arrow sin 47 space cross times space fraction numerator 1 over denominator cos 43 end fraction space plus space cos 43 space cross times space fraction numerator 1 over denominator sin 47 end fraction space minus space xcos squared 45 equals 0
rightwards double arrow sin 47 cross times fraction numerator 1 over denominator cos open parentheses 90 minus 47 close parentheses end fraction plus cos 43 space cross times space fraction numerator 1 over denominator sin open parentheses 90 minus 43 close parentheses end fraction minus xcos squared 45 equals 0
rightwards double arrow sin 47 cross times fraction numerator 1 over denominator sin 47 end fraction plus cos 43 space cross times space fraction numerator 1 over denominator cos 43 end fraction minus xcos squared 45 equals 0
rightwards double arrow 1 plus 1 minus straight x equals 0
rightwards double arrow straight x equals 2

Answered by Renu Varma | 19th Oct, 2020, 10:44: AM