Question

Sin30-cos^2 30+ctg45 Срочно нужно!!! Зарание спасибо

Answer 1

sin30=1/2
cos30=sqr(3)/2
ctg45=1
sin30-cos^2 30+ctg45=1/2-3/4+1=3/4

Answer 2

Trigonometric Expression Calculation

To solve the given trigonometric expression sin(30) - cos^2(30) + ctg(45), we can break it down step by step.

1. Calculate the Values of Trigonometric Functions at Specific Angles: - The sine of 30 degrees is 0.5. - The cosine of 30 degrees is √3/2. - The cotangent of 45 degrees is 1.

2. Substitute the Values into the Expression: - sin(30) = 0.5 - cos^2(30) = (√3/2)^2 = 3/4 - ctg(45) = 1

3. Evaluate the Expression: - sin(30) - cos^2(30) + ctg(45) = 0.5 - 3/4 + 1 - = 0.5 - 0.75 + 1 - = 0.25 + 1 - = 1.25

So, sin(30) - cos^2(30) + ctg(45) = 1.25.