ICSE Class 10 Answered
eliminate A if
tan A+sin A=m
tan A-sin A=n
Asked by shivasanthosh0804 | 23 Jan, 2019, 06:20: PM
Expert Answer
tan A + sin A = m ...............(1)
tan A - sin A = n .................(2)
By adding (1) and (2), 2tanA = m+n or tanA = (m+n)/2 ..............(3)
By subtracting (2) from (1), 2 sinA = m-n or sinA = (m-n)/2 .........(4)
( tan A )/(sin A) = 1/( cos A) = (m+n)/(m-n) or cos A = (m-n)/(m+n) ...............(5)
we have sin2A + cos2A = 1,
hence from eqn.(4) and (3),
Answered by Thiyagarajan K | 23 Jan, 2019, 09:37: PM
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