sin2A = 2 sin A is true when A = ?
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Step-by-step explanation:
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Sin 2A = 2 sin A is true when A = ? with solution please
Ask for details Follow Report by Yajmera8 01.03.2019
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sin2A=2sinA
2sinA*cosA=2sinA
cosA=2sinA/2sinA
cosA=1
A=0
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mysticd
mysticd Genius
sin \:2A = 2 sin \:A ( Given )
\implies sin\:2A - 2sin\:A = 0
\implies 2sin\:A cos\:A - 2sin \:A = 0
\boxed {\pink { sin \:2A = 2sinAcosA }}
\implies 2sin A ( cosA - 1 ) = 0
\implies 2sinA = 0 \:Or \: cosA - 1 = 0
\implies sinA = 0 \:Or \: cosA = 1
\implies sinA = sin \:0\degree \:Or \: cosA = cos\:0\degree
\implies A = 0 \degree \:Or \: A = 0\degree
Therefore.,
\red { Value \: of \: A } \green {= 0 \degree }
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Answer:
A=0
Step-by-step explanation:
sin 2A = 2 sinA cosA
so, sin 2A = 2 sinA
2 sinA cosA = 2 sin A
cos A = 1
A = 0 degree
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