Archive
13th of April 2017
Mathematics
Q:

SOLVE tan5degree*tan25degree*tan30degree*tan65degree*tan85degree


SOLVE sin[52degree-A] - cos[38degree-a]


Abhishek Kumar - Maharashtra - Class X

Thursday, April 13, 2017 at 17:37:PM

A:

begin mathsize 14px style tan space 5 degree space tan space 25 degree space tan space 30 degree space tan space 65 degree space tan space 85 degree
equals left parenthesis tan space 5 degree space tan space 85 degree right parenthesis left parenthesis tan space 25 degree space tan space 65 degree right parenthesis space tan space 30 degree
equals left parenthesis tan space 5 degree space c o t space 5 degree right parenthesis left parenthesis tan space 25 space c o t space 25 degree right parenthesis space tan space 30 degree
equals 1 cross times 1 cross times fraction numerator 1 over denominator square root of 3 end fraction
equals fraction numerator 1 over denominator square root of 3 end fraction

sin space left parenthesis 52 degree plus A right parenthesis minus cos left parenthesis 38 degree minus A right parenthesis
equals sin left parenthesis 52 degree plus A right parenthesis minus sin left square bracket 90 minus left parenthesis 38 degree minus A right parenthesis right square bracket
equals sin left parenthesis 52 degree plus A right parenthesis minus sin left parenthesis 52 plus A right parenthesis
equals 0 end style

Thursday, April 13, 2017 at 17:53:PM