Question

AB=5 BC=6 cosa=0,6 найти sinа​

Answer 1

Ответ:

sina = 2

Объяснение:

cosa = AB/AC

AC = AB×cosa = 5×0,6 = 3.

sina = BC/AC = 6/3 = 2

[ Знак / - означает дробь ]

Answer 2

To find sin(a), we can use the trigonometric identity:

sin^2(a) + cos^2(a) = 1

Given that cos(a) = 0.6, we can substitute the value into the equation:

sin^2(a) + (0.6)^2 = 1

sin^2(a) + 0.36 = 1

sin^2(a) = 1 - 0.36

sin^2(a) = 0.64

Taking the square root of both sides, we get:

sin(a) = ±√0.64

Since sin(a) can be positive or negative, we have two possible solutions:

sin(a) = √0.64 ≈ 0.8 or sin(a) = -√0.64 ≈ -0.8

Therefore, the possible values of sin(a) are approximately 0.8 or -0.8.