Question

2,5-5sin^2x-5cos^2+0,5=​

Answer 1

Ответ:

2.5-5sin^2(x)-5cos^2(x)+0.5

1) 2.5+0.5=3

2) sin^2(x)+cos^2(x), откуда

3-5(sin^2(x)+cos^2(x)) = 3-5 = -2

Answer 2

It appears that you have an equation involving trigonometric functions. The equation you provided is not clear and seems to contain some errors. It's possible that you intended to write something like this:

2.5 - 5sin^2(x) - 5cos^2(x) + 0.5 = 0

If this is the equation you meant, let's solve it:

1. Combine like terms: 2.5 - 5(sin^2(x) + cos^2(x)) + 0.5 = 0

Now, recall that sin^2(x) + cos^2(x) is equal to 1 (this is a fundamental trigonometric identity):

2.5 - 5(1) + 0.5 = 0

2.5 - 5 + 0.5 = 0

-2 + 0.5 = 0

-1.5 = 0

It appears that there is no solution to this equation because it leads to a contradiction (a non-zero number equal to 0). Please double-check the original equation for any errors, or if you had a different equation in mind, provide more context or clarify it, and I'd be happy to help further.