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What is sin2x
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What is the trigonometry identity of sin2x

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peter
Asked by peterrep:938
University of Lagos Nigeria
20 December 2019

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james_mark
James_mark answeredrep:231
School not set Nigeria
19 July 2020
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2sinxcosx

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dp
james_mark
Check my new answer
dp
peter, University of Lagos
How? Is there an explanation for this




james_mark
James_mark answeredrep:231
School not set Nigeria
19 July 2020
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sin(2x) = sin(x+x)

from sin(a+b)= sin(a).cos(b)+cos(a).sin(b)

sin(x + x) = sin(x).cos(x) + cos(x).sin(x)

= sin(x).cos(x) + sin(x).cos(x)

= 2sin(x)cos(x)

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