What is the axis of symmetry for f(x) = −5x2 − 20x − 10

For this case we have the following function:
 
 To find the axis of symmetry, the first thing to do is to derive the function.
 We have then:
 
 Equaling zero we have:
 
 We clear the value of x.
 We have then:
 
 
 The axis of symmetry is given by:
 x = -2

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.