## The formula for cot (The formula for the cotangent)

+1 The formula for cot (The formula for the cotangent) +1

## The formula for tg (The formula for the tangent)

0 The formula for tg (The formula for the tangent) 0

## The formula for sin 3a [formula for the sine of triple angle]

0 The formula for sin 3a [formula for the sine of triple angle] 0

## The formula for sin 2a [formula for the sine of double angle]

0 The formula for sin 2a [formula for the sine of double angle] 0

## The formula for cos (a – b) [formula for the cosine of difference]

0 The formula for cos (a – b) [formula for the cosine of difference] 0

## The formula for cos (a + b) [formula for the cosine of sum]

0 The formula for cos (a + b) [formula for the cosine of sum] 0

## The formula for sin^2 a + cos^a [the Pythagorean identity]

0 The formula for sin^2 a + cos^a [the Pythagorean identity] 0

## The formula for sin (a – b) [formula for the sine of difference]

0 The formula for sin (a – b) [formula for the sine of difference] 0