Solve cos^-1(12^2-5^2-13^2)/-2*5*13

$$\cos ^ { - 1 } \frac { ( 12 ^ { 2 } - 5 ^ { 2 } - 13 ^ { 2 } ) } { - 2 \times 5 \times 13 }$$

Evaluate

$$\frac{500000000000000}{499988734605181}\approx 1.000022531$$

Solution Steps

Evaluate trigonometric functions in the problem

$$0.999977469210362 ^ {-1}$$

Calculate 0.999977469210362 to the power of -1 and get \frac{500000000000000}{499988734605181}.

$$\frac{500000000000000}{499988734605181}$$

Factor

$$\frac{2 ^ {14} \cdot 5 ^ {15}}{67 \cdot 7462518426943} = 1\frac{11265394819}{499988734605181} = 1.000022531297286$$