Trig Need To Know Formula

Question 1

Sec(x)

Answer 1

1/cos(x)

Question 2

Cosec(x)

Answer 2

1/sin(x)

Question 3

Cot(x)

Answer 3

1/tan(x)

Question 4

Sec^2(x)

Answer 4

Tan^2(x) + 1

Question 5

Cosec^2

Answer 5

1 + cot^2(x)

Question 6

Sin2A

1*

Answer 6

2 SinA CosA

Question 7

Cos 2A

3*

Answer 7

Cos^2 (A) - Sin^2 (A)

2Cos^2 (A) - 1

1 - 2Sin^2 (A)

Question 8

Tan2A

1*

Answer 8

2TanA / 1-Tan^2 (A)