Question

Найдите sin a, если cos a=1 ,0<a<π÷2

Answer 1

cos a=1  =>  a = 0  => sin a=0

Answer 2

Cos а=1 следовательно а=0 след sin a=0 как то так .

Answer 3

Given that cos(a) = 1 and 0 < a < π/2, we can use the Pythagorean identity to find sin(a).

The Pythagorean identity states: sin^2(a) + cos^2(a) = 1

Since cos(a) = 1, we can substitute it into the equation:

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

sin^2(a) + 1 = 1

Now, we can isolate sin^2(a):

sin^2(a) = 1 - 1

sin^2(a) = 0

Now, we take the square root of both sides:

sin(a) = √0

Since the square root of 0 is 0:

sin(a) = 0

So, sin(a) is 0 when cos(a) = 1 and 0 < a < π/2.