11.8

Which of the following is not an identity?

(1 + cos^2x) / sin^2x = 1

Which of the following is an identity

(tanx + cotx)(sinx cosx) = 1

The expression (secx + tanx)^2 is the same as _.

1 + 2tan^2x + 2secx tanx

The expression (cscx + cotx)^2 is the same as _.

1+ 2cot^2x+2cscx cotx

The equation cost +sinx = √3+1 / 2 is an identity.

False

The equation tan^2x + 1 = sec^2x.

True

Which of the following are identities?

cot^2x + 1 = csc^2x sin^2 x + cos^2x = 1

Which of the following is not an identity?

csc^2x + sec^2x = 1

The expression sinx +cotx cosx can be simplified to _.

cscx

Which of the following equations are identities? Check all that apply

cscx = 1/sinx cotx = 1/ tanx

The expression (tanx + cotx)^2 is the same as _.

sec^2x + csc^2x

The expression sinx(cscx - cotx cosx) can be simplified

sin^2x

Which of the following is an identity

sin^2x sec^2x + 1 = tan^2x csc^2x

Which of the following equations are identities? Check all that apply

sin^2x=1 - cos^2x tan^2x = sec^2x - 1

Which of the following would be an acceptable first step in simplifying the expression sinx / 1 + sins

sinx (1 - six) / (1 + sinx) (1 - sinx)