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Emmy Knox 2022-06-30 Answered
Show that tan α + 5 sin α 2 ( 5 cos α 1 ) is equivalent to 5 4 sin ( 2 α ) 1 2 tan α
I tried:
sin α cos α + sin α 2 ( 5 cos α 1 ) = sin α + 5 sin α cos α cos α 2 ( 5 cos α 1 ) = sin α cos α ( 5 cos α + 1 ) 2 ( 5 cos α 1 ) = tan α ( 5 cos 2 α 1 ) 2 = ? ? ?
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Answers (1)

odmeravan5c
Answered 2022-07-01 Author has 20 answers
Now simply
5 sin α cos α tan α 2
5 × 2. sin α cos α 4 tan α 2
(sin2x=2 sinx cox) 5 × sin 2 α 4 tan α 2
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