Question

Cos α=0,5  16 cos 2 α-?    

Answer 1

Получай.......................................

Answer 2

To find the value of the expression 16 cos(2α) - ?, we need to know the value of cos(α).

Given that cos(α) = 0.5, we can substitute this value into the expression:

16 cos(2α) - ?

Now, let's use the double-angle formula for cosine:

cos(2α) = 2 cos²(α) - 1

Substituting cos(α) = 0.5 into the double-angle formula, we get:

cos(2α) = 2(0.5)² - 1 = 2(0.25) - 1 = 0.5 - 1 = -0.5

Finally, we substitute the value of cos(2α) back into the original expression:

16 cos(2α) - ? = 16(-0.5) - ? = -8 - ?

Since we don't have a value for ?, we cannot determine the final result without additional information.