1 - Cos²x + tg²x * Cos²x
Sin²x + (Sinx/Cosx * Cosx)²
Sin²x + Sin²x
2Sin²x
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1 - Cos²x + tg²x * Cos²x
Sin²x + (Sinx/Cosx * Cosx)²
Sin²x + Sin²x
2Sin²x