Question

if cos4x + sin2x-p=0,p belongs to R has real solution then

Answer 1

Answer:

OC db if FL if DJ p FL if ghj

Step-by-step explanation:

h FL if FL jc FL jc GK jb FL if FL KB FL

Answer 2

cos

4

x+sin

2

x−p=0

∴cos

2

xcos

2

x+sin

2

x−p=0

∴cos

2

x(1−sin

2

x)+sin

2

x−p=0

∴cos

2

x−sin

2

xcos

2

x+sin

2

x−p=0

∴1−sin

2

xcos

2

x=p

∴1−

4

sin

2

2x

=p

0≤sin

2

2x≤1

∴

4

3

≤1−

4

sin

2

2x

≤1

∴

4

3

≤p≤1