Question

2+ sin ^2 альфа + cos^2альфа-1

Answer 1

$2+ sin ^2\alpha + cos^2\alpha-1=2+1-1=2$

Answer 2

The expression you've provided is a combination of trigonometric functions and constants. Let's simplify it step by step:

2 + sin^2(α) + cos^2(α) - 1

Now, recall the trigonometric identity: sin^2(α) + cos^2(α) = 1.

Using this identity, we can simplify the expression:

2 + 1 - 1

Now, simplify further:

2 + 0

The final result is:

2

So, the value of the expression 2 + sin^2(α) + cos^2(α) - 1 simplifies to 2.