Factoring Trigonometric Expressions

Section 5.1



Question 24

cos x - 2/cos^2 x - 4

cos x - 2/(cos x - 2)(cos x + 2)

Answer: 1/(cos x + 2)

Question 23

sec^2 x - 1/sec x - 1

(sec x - 1)(sec x + 1)/sec x - 1

Answer: sec x + 1

 

correct

 

Having fun with trigonometric identities. You see, less questions works out best.