Question

Sin(90-альфа)×cos+cos(90-альфа)- sin=

Answer 1

Решение:

sin(90°-α)×cosα + cos(90°-α)-sinα = cosα × cosα + sinα - sinα = cos²α

Формулы приведения:

sin(90°-α) = cosα        cos(90°-α) = sinα

Ответ: cos²α

Answer 2

It seems there are some syntax errors and missing values in the equation you provided. Let's break it down and correct it step by step:

1. First, let's rewrite the equation using the correct mathematical notation:

   sin(90 - α) × cos(α) + cos(90 - α) - sin(α)

2. Next, we need to know the value of α in order to evaluate the equation. Without the value of α, we cannot provide a numerical result. Could you please provide the value of α?