dracheleuzumd
dracheleuzumd
23-09-2016
Mathematics
contestada
solve: sin^2 x + sin x cos x = 0
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HomertheGenius
HomertheGenius
26-09-2016
sin² x + sin x cos x = 0
sin x ( sin x + cos x ) = 0
sin x = 0 ;
x 1 = k π ; k ∈ Z
sin x + cos x = 0 / ²
sin² x + 2 sin x cos x + cos² x = 0
2 sin x cos x + 1 =0
sin ( 2 x ) = - 1
x = 3π / 2 + 2 kπ / : 2
x 2 = 3π / 4 + kπ ; k ∈ Z
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