trig identities

sin

100

cos(x)= 

1/sec(x)

200

secxsinx/tanx+cotx = sin²x

sinx/cosx x sinxcosx = sin²x

300

sin²x+cos²x=

1

400

sin²x-1

cos^2x

500

tan²x / (tan²x +1) = sin²x

(sin² x /cos² x )? (cos²x /1) =sin²x

cos

100

sin=

1/csc

200

cos²x-1

sin²x

300

cosx+1/sin³x= cscx/1-cosx

cscx/1-cosx

400

cos2 x = csc x cos x / tan x + cot x

cos x / sin x 1 = cos2 x / 1 = cos2 x

500

cos4(x) – sin4(x) = cos(2x)

cos2(x) + sin2(x) = 1

tan

100

tan=

1/cos

200

tan also= 

sinx/cosx

300

cot=

cos/sin

400

cot also =

1/tan

500

(cos x/1 - sin x) - (cos x /1 + sin x)  = 2 tan x

2 sin x/ cos x = 2 tan x

csc

100

csc=

1/sin

200

csc²=

1+cot²

300

sec²x/ sec²x-1= csc²x

=csc²x

400

1+cot²x=

csc²x

500

(sinx+cosx)(tanx+cotx)=secx+cscx

= 1/cos+1/sin+1/cscx

sec

100

sec=

1/cos

200

sec²=

1 + tan²

300

secx - tanxsinx = 1/secx

cosx =1/secx

400

tan²x+1=

sec²x

500

tan x sin x + cos x = sec x

= 1 cos x = sec x