Question

Cos x+Sec x=4,then find Cos^4x+Sec^4x​

Answer 1

Answer:

suppose the sum is

2

sin

x

sec

x

(

cos

4

x

_

sin

4

x

)

_

sin

4

x

)

=

tan

2

x

=>

2

sin

x

cos

x

(

cos

2

x

+

sin

_

2

x

)

.

(

cos

2

x

_

sin

2

x

)

sin

2

x

=

2

sin

x

cos

x

,identity

cos

2

x

+

sin

2

x

=

1

,identity

cos

2

x

_

sin

2

x

=

cos

2

x

,identity

•°•

=>

sin

2

x

cos

2

x

=

tan

2

x

=

R

H

S

Step-by-step explanation:

PLEASE MARK AS BRAINLIST. .......PLEASE. ..........PLEASE ☺☺