Sec^-1(1) find exact value

Step-by-step explanation:

You are looking for an angle,

θ

, whose secant is -1.

Since

sec

x = 1

cos x , this is the same as looking for an angle whose cosine is -1.

This is one of the standard angles, which one should have memorized. The inverse cosine provides values between 0 and

π only.

The exact value is

π

radians or 180 degrees.

π

Step-by-step explanation:

You are looking for an angle,

θ

, whose secant is -1.

Since

sec

x

=

1

cos

x

, this is the same as looking for an angle whose cosine is -1.

This is one of the standard angles, which one should have memorized. The inverse cosine provides values between 0 and

π

only.

The exact value is

π

radians or 180 degrees.

ok then what happened.