A) (SIN 340 +COS 56 )0 2-4 SIN 34 COS 560 0B) (COS 360 -SIN 36 ).(C...

Bài 5: Tính: a) (sin 34

⁰

+cos 56 )

^{0 2}

-4 sin 34 cos 56

⁰

⁰

b) (cos 36

⁰

-sin 36 ).(cos 37

⁰

⁰

+sin 38 ).(cos 42

⁰

⁰

-sin 48 )

⁰

c) (tg52

⁰

+cotg43 ).(tg29

⁰

⁰

-cotg61 ).(tg13

⁰

⁰

-tg24 )

⁰