Công Thức Lượng Giác Toán 11

Front

sin(a ± b)

Back

sin a cos b ± cos a sin b

Front

cos(a ± b)

Back

cos a cos b ∓ sin a sin b

Front

tan(a ± b)

Back

(tan a ± tan b) / (1 ∓ tan a tan b)

Front

sin 2a

Back

2 sin a cos a

Front

cos 2a

Back

cos² a - sin² a

Front

tan 2a

Back

2 tan a / (1 - tan² a)

Front

sin² a + cos² a

Back

1

Front

1 + tan² a

Back

sec² a

Front

1 + cot² a

Back

csc² a

Front

sin(-a)

Back

-sin a