Question

Sin2 57 + cos2 57 - tg 45 =

Answer 1

Ответ:

Объяснение:

sin^2 57+cos^2 57-tg45=(sin^2 57+cos^2 57)-1=1-1=0

Answer 2

Sin²57°+cos²57°-tg45°=1-tg45°=1-1=0

Answer 3

Let's break down the expression step by step:

1. sin^2(57°) + cos^2(57°): This is an identity in trigonometry known as the Pythagorean identity. For any angle θ, sin^2(θ) + cos^2(θ) equals 1. So, for the angle 57°:

   sin^2(57°) + cos^2(57°) = 1.

2. tan(45°): The tangent of 45° is equal to 1. So, tg 45 = 1.

Putting it all together:

sin^2(57°) + cos^2(57°) - tg 45 = 1 + 1 - 1 = 1.

Therefore, sin^2(57°) + cos^2(57°) - tg 45 equals 1.