Verify the identity. tan ² x + sec ² x= 1 + 2 tan ² x Which of the following four statements establishes the identity? O A. O B. C. O D. 2 tan x + sec tan ² x + sec 2 tan² x + 2 2 x = tan ²x + (tan ²x - 1) = 1 + 2 tan ² x ² x = tan ²x + (1 - tan²x) = 1 + 2 tan sec² x = 1 = 1 + 2 tan ² x 2 ² x 2 2 tan² x+ sec² x=tan²x + (1 + tan ²x) = 1 + 2 tan X

Which of the following is not an identity? 1. tan x + cotx = sec a CSC X II. cos²x = sin (csc x + sin æ . sin²x = cos x (sec x 2 OII and III O11 OI OIII Smi cos x) TEAT

Prove the following identity: Is this correct? If not answer the question properly and explain what i did wrong

If tan(x- y) =; tanx-tan y then determine the exact value of the following expression... 1+tan x-tan y 5 tan- 3Tt tan g 1+ tan • tan 8.