Trigonometry formula Booklet PDF download

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Below formula list is a summery of only the basic formulas. The formula booklet PDF contains all the necessary formulas, diagrams and graphs.

1.	Sin2x+Cos2x	=	1
2.	1+tan2x	=	Sec2x
3.	1+cot2x	=	Cosec2x
4.	Sinx	=	$\frac{1}{\cos ecx}$ or cosecx = $\frac{1}{\sin x}$
5.	Cosx	=	$\frac{1}{secx}$ or secx = $\frac{1}{\cos x}$
6.	Tanx	=	$\frac{1}{cotx}$ or cotx= $\frac{1}{\tan x}$
7.	Sin2x	=	2sinxcox
8.	Cos2x	=	Cos2x-sin2x = 2cos2x-1 = 1-2sin2x
9.	Tan2x	=	$\frac{2\tan x}{1–{\tan }^{2}x}$
10.	Sin3x	=	3sinx-4sin3x
11.	Cos3x	=	4cos2x-3cosx
12.	Tan 3x	=
13.	Sin(x+y)	=	Sinx cosy+ cosx siny
14.	Sin (x-y)	=	Sinx cosy- cosx siny
15.	Cos(x+y)	=	cosx cosy- sinx siny
16.	Cos(x-y)	=	cosx cosy+ sinx siny
17.	Tan(x+y)	=	$\frac{\tan x+\tan y}{1–\tan x\tan y}$
18.	Tan (x-y)	=	$\frac{\tan x–\tan y}{1+\tan x\tan y}$
19.	Cot (x+y)	=
20.	Cot (x-y)	=
21.	Sinx+ siny	=	2sin
22.	Sinx –siny	=	2cos
23.	Cosx+cosy	=	2cos
24.	Cosx-cosy	=	-2sin
25.	2 sinx cosy	=	Sin (x+y) +sin (x-y)
26.	2 cosx siny	=	Sin (x+y) –sin (x-y)
27.	2 cos x cosy	=	Cos (x+y) + cos (x-y)
28.	2 sinx siny	=	Cos (x-y) –cos (x+y)