abramdent
07.04.2020 •
Mathematics
(1 + sinx)(1 - sinx) = cos -x
Can someone verify the trig equation?
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Ответ:
steps
Step-by-step explanation:
(1 + sinx)(1 - sinx) = 1 - sin²x = cos²x or = cos² -x
cos -x = cos x
∴ (1 + sinx)(1 - sinx) will not equal cos -x, unless x = ±360° or 0°
where cos ±360° or cos 0° = 1
Ответ:
Domain is: (0, ∞) , {x|x > 0}
Step-by-step explanation: