Getting sin 2 </msup> and cos 2 </msup> values from sin 2

mikior9t3ue

mikior9t3ue

Answered question

2022-04-10

Getting sin 2 and cos 2 values from sin 2 α = 1 4 cos 2 α = 1 4 ( 1 sin 2 α )

Answer & Explanation

Julius Johnston

Julius Johnston

Beginner2022-04-11Added 17 answers

Take the first and third part of the equality:
sin 2 α = 1 4 ( 1 sin 2 α ) sin 2 α = 1 4 1 4 sin 2 α 5 4 sin 2 α = 1 4 sin 2 α = 1 5
Then just plug it into first and second part of the equality and you'll get the cos 2 α value
quorums15lep

quorums15lep

Beginner2022-04-12Added 4 answers

sin 2 α = 1 4 cos 2 α cos 2 α = 1 sin 2 α sin 2 α = 1 4 ( 1 sin 2 α ) sin 2 α = 1 4 1 4 sin 2 α sin 2 α + 1 4 sin 2 α = 1 4 5 4 sin 2 α = 1 4 5 sin 2 α = 1 sin 2 α = 1 5

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