Trig Identities Flashcards
1
Q
what is the reciprocal of sin x ?
A
1/cosec x
2
Q
what it the reciprocal of cos x ?
A
1/sec x
3
Q
what is the reciprocal of tan x ?
A
1/cot x
4
Q
what it the reciprocal of cosec x ?
A
1/ sin x
5
Q
what it the reciprocal of sec x ?
A
1/ cos x
6
Q
what is the reciprocal of cot x ?
A
1/ tan x
7
Q
what is tan x in terms of sin and cos?
A
sin x / cos x
8
Q
what is cot x in terms of sin and cos?
A
cos x /sin x
9
Q
what is 1 in terms of sin x and cos x?
A
1 = sin^2 x + cos^2 x
10
Q
what does 1 + tan^2 x equate to
A
sec^2 x
11
Q
what does 1 + cot^2 x equate to
A
cosec^2 x
12
Q
what is sin (A+B)
A
sinAcosB+sinBcosA
13
Q
what is cos (A+B)
A
cosAcosB-sinAsinB
14
Q
what is tan(A+B)
A
tanA+tanB / 1-tanAtanB
15
Q
what is sin 2x
A
2sinxcosx
