Question

1-sin2(-y)/cosy.....​

Answer 1

Ответ:

Объяснение:

Ответ и решение на фото:

Answer 2

It looks like you have an expression:

1 - sin^2(-y) / cos(y)

Let's simplify this expression step by step:

1. First, remember the trigonometric identity: sin(-x) = -sin(x). This means that sin(-y) = -sin(y).

2. Now, we can substitute sin(-y) with -sin(y):

1 - (-sin(y))^2 / cos(y)

3. Next, simplify the square of -sin(y):

1 - (sin(y))^2 / cos(y)

4. Finally, you can recognize that (sin(y))^2 is equal to 1 - (cos(y))^2 using the Pythagorean identity for sine and cosine:

1 - (1 - (cos(y))^2) / cos(y)

Now, you have:

1 - 1 + (cos(y))^2 / cos(y)

Simplify further:

(cos(y))^2 / cos(y)

And the final result is:

cos(y)

So, 1 - sin^2(-y) / cos(y) simplifies to cos(y).