Question

Чему равен cos(x-11п/2). Заранее спасибо за ответ

Answer 1

$cos(x- \frac{11 \pi }{2} )=-sin(x)$

Answer 2

Cosine Function Calculation

The value of cos(x-11π/2) can be calculated using the trigonometric identity: cos(a-b) = cos(a)cos(b) + sin(a)sin(b).

Using this identity, we can rewrite cos(x-11π/2) as cos(x)cos(11π/2) + sin(x)sin(11π/2).

Now, let's substitute the values of cos(11π/2) and sin(11π/2): - cos(11π/2) is equal to 0. - sin(11π/2) is equal to 1.

So, the expression becomes cos(x)*0 + sin(x)*1, which simplifies to sin(x).

Therefore, cos(x-11π/2) is equal to sin(x).

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