Question

Cos(a-45°) =????? Помогите пожалуйста.

Answer 1

Ответ:

0.5√2 (cosα + sinα)

Объяснение:

cos (α - 45°) = сos α · cos 45° + sinα · sin 45° = 0.5√2 (cosα + sinα)

Answer 2

Cos(a - 45°) = cos(a)cos(45°) + sin(a)sin(45°)

Since cos(45°) = sin(45°) = √2 / 2, we can substitute these values:

Cos(a - 45°) = cos(a) * (√2 / 2) + sin(a) * (√2 / 2)

This expression represents the cosine of the angle (a - 45°). However, without knowing the specific value of 'a', we cannot simplify it further.