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Fleurale
@Fleurale
April 2019
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Démontrer que: [tan (a)]² +1 = 1/[cos (a)]²
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starvanessa1
[tan (a)]
² +1
=[sin²(a)/cos²(a)]+1
=sin
²(a)+cos²(a)/cos
²(a)
=1/cos
²(a)
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Bonjour,
On sait que
2 votes
Thanks 1
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=sin²(a)+cos²(a)/cos²(a)
=1/cos²(a)
On sait que