Question

The equation 4 4 sin cos x x a   has a solution for

Answer 1

Answer:

Hope this answer will help you

Step-by-step explanation:

sin

4

x+cos

4

x=a

⇒(

2

1−cos2x

)

2

+(

2

1+cos2x

)

2

=

2

1+cos

2

2x

=a

⇒

2

1

≤a≤1 since, 0≤cos

2

2x≤1