Identities Of Trigonometric Function

Question 1

cos^2 x + sin^2 x =

Answer 1

1

Question 2

1+cot^2 x=

Answer 2

csc^2 x

Question 3

1+tan^2 x

Answer 3

sec^2 x

Question 4

cos^2 x - sin^2 x =

Answer 4

cos 2x

Question 5

1 + cos 2x / 2 =

Answer 5

cos^2 x

Question 6

2sin x cos x =

Answer 6

sin 2 x

Question 7

1 - cos 2 x / 2 =

Answer 7

sin^2 x