Last Activity: 13 Years ago
tan x= c sino/(b+ c coso)
on solving we get x= cos-1 4/5 or sin-1 3/5
A = B+C
A-B = C , now squaring both sides
(A-B)2 = C2
A2+B2-2(A.B) = C2
(A.B) = (25+16-9)/2 = 32/2 (A.B(A dot B) = ABCOS@)
ABCOS@ = 16
COS@ = 4/5
SIN@ = 3/5 OR @ = SIN-3/5
OPTION D) IS CORRECT
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Last Activity: 2 Year ago(s)