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TataBloom's Profile
Star Rating: [2 
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Member Since: Jan 10, 2014
Total # Questions Provided: 1
Total # Answers Provided: 0
]
Member Since: Jan 10, 2014
Total # Questions Provided: 1
Total # Answers Provided: 0
jan
10
2014
Relação fundamental da trigonometria.
Olá! Minha dúvida é bem básica. Nessa conta: seno²x + cos²x = 1 (-1/2) ² + cos²x = 1 1/4 + cos²x = 1 cos² x = 1-1/4 cos²x = 3/4 ... Porque \"1-1/4 virou 3/4\"? Eu sinceramente, não consigo...
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