Question

4sin-4cos 2 ------------------ если ctg=3 5 sin^2 1-sin^2+ctg^2×sin^2

Answer 1

Ответ:

Пошаговое объяснение:

tg1.4*ctg1.4+cos²(-3пи/4)-sin²(пи/2)-cos²(пи/2)= 1+cos²(3пи/4)-sin²(пи/2)-cos²(пи/2) =1+(-sin(пи/4))²-1-0=1+(-√2/2)²-1=2/4=1/2

Answer 2

It seems like there are some typos and missing information in your expression, which makes it difficult to provide a meaningful answer. However, I'll try to help you interpret what I can from the given text:

Let's analyze the given expression step by step:

1. 4sin - 4cos(2): This expression seems incomplete. It should have an angle (in radians) inside the cosine function, like cos(x) or cos(θ). Without a specific angle, we cannot evaluate this expression.

2. ctg = 3: "Ctg" usually refers to the cotangent trigonometric function. It's defined as the reciprocal of the tangent function: ctg(θ) = 1 / tan(θ). So, if ctg(θ) = 3, then tan(θ) = 1/3.

3. 5sin^2(1) - sin^2 + ctg^2 × sin^2: Again, this expression is incomplete and has some typos. It seems to be a combination of sine (sin) and cotangent (ctg) functions. However, the variables and exponents are not well-defined.

To proceed further, please provide the missing or corrected parts of the expression, and I'll be glad to help you solve it. Make sure to specify the angles or variables used in the trigonometric functions for accurate calculations.