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Home / Doubts and Solutions/MAHARASHTRA OLD/Class 10/Mathematics

SOLVE tan5degree*tan25degree*tan30degree*tan65degree*tan85degree
 
SOLVE sin[52degree-A] - cos[38degree-a]
 
 

Asked by Pushpanjali 13th April 2017, 5:37 PM
Answered by Expert
Answer:

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

Answered by Expert 13th April 2017, 5:53 PM
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