Question

-19/(sin^2 53° + cos^2 233°)

Answer 1

Пошаговое объяснение:

решение смотри на фотографии

Answer 2

To simplify the expression, let's evaluate the values of sin^2(53°) and cos^2(233°) first.

sin^2(53°) = sin^2(180° - 53°) = sin^2(127°) cos^2(233°) = cos^2(233° - 180°) = cos^2(53°)

Now we can substitute these values into the expression:

-19/(sin^2(53°) + cos^2(233°))

-19/(sin^2(127°) + cos^2(53°))

Remember that sin^2(θ) + cos^2(θ) = 1 for any angle θ.

-19/(1 + 1)

-19/2

Therefore, the simplified value of the expression is -19/2.