![Wykaż, że cos 40° cos 80° cos 160° =-frac{1}{8}.... Zadania.info: rozwiązanie zadania, Tożsamości, 6811428 Wykaż, że cos 40° cos 80° cos 160° =-frac{1}{8}.... Zadania.info: rozwiązanie zadania, Tożsamości, 6811428](https://img.zadania.info/zad/6811428/HzadR1x.gif)
Wykaż, że cos 40° cos 80° cos 160° =-frac{1}{8}.... Zadania.info: rozwiązanie zadania, Tożsamości, 6811428
![SOLVED:Values of Trigonometric Functions Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number, and then find its exact value. \cos 10^{\circ} \cos 80^{\circ}-\sin 10^{\circ} \ SOLVED:Values of Trigonometric Functions Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number, and then find its exact value. \cos 10^{\circ} \cos 80^{\circ}-\sin 10^{\circ} \](https://cdn.numerade.com/previews/feba1906-26ba-42fd-a937-2288ee5d2f39_large.jpg)
SOLVED:Values of Trigonometric Functions Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number, and then find its exact value. \cos 10^{\circ} \cos 80^{\circ}-\sin 10^{\circ} \
![Sin 50-Sin 70-Sin 40+Sin 80-Cot 66 Cos 40-Cos 50-Cos 80+Cos 70 8 5 Prove the Following Identities a Sin 20 Sin 40° B Cos 40 C Tan 20° D 16 Si E · Sin 50-Sin 70-Sin 40+Sin 80-Cot 66 Cos 40-Cos 50-Cos 80+Cos 70 8 5 Prove the Following Identities a Sin 20 Sin 40° B Cos 40 C Tan 20° D 16 Si E ·](https://pics.me.me/sin-50-sin-70-sin-40-sin-80-cot-66-cos-40-cos-50-cos-80-cos-43881718.png)