Whakaoti i te (6.8^2+6.8^2)-(2*6.8*6.8)cos(72)

$$( { 6.8 }^{ 2 } + { 6.8 }^{ 2 } )-(2 \times 6.8 \times 6.8) \cos ( 72 )$$

Aromātai

$$63.902108360204859824$$

Ngā Upane Otinga

Evaluate trigonometric functions in the problem

$${({(6.8)} ^ {2} + {(6.8)} ^ {2})} - {(2 \cdot 6.8 \cdot 6.8)} 0.30901699437494745$$

Tātaihia te 6.8 mā te pū o 2, kia riro ko 46.24.

$$46.24+6.8^{2}-2\times 6.8\times 6.8\times 0.30901699437494745$$

Tātaihia te 6.8 mā te pū o 2, kia riro ko 46.24.

$$46.24+46.24-2\times 6.8\times 6.8\times 0.30901699437494745$$

Tāpirihia te 46.24 ki te 46.24, ka 92.48.

$$92.48-2\times 6.8\times 6.8\times 0.30901699437494745$$

Whakareatia te 2 ki te 6.8, ka 13.6.

$$92.48-13.6\times 6.8\times 0.30901699437494745$$

Whakareatia te 13.6 ki te 6.8, ka 92.48.

$$92.48-92.48\times 0.30901699437494745$$

Whakareatia te 92.48 ki te 0.30901699437494745, ka 28.577891639795140176.

$$92.48-28.577891639795140176$$

Tangohia te 28.577891639795140176 i te 92.48, ka 63.902108360204859824.

$$63.902108360204859824$$

Tauwehe

$$\frac{13819660112501051 \cdot 17 ^ {2}}{2 ^ {14} \cdot 5 ^ {18}} = 63\frac{56381772512803840}{62500000000000000} = 63.90210836020486$$