Question

# Find the value of x cos35*=21/x

Trigonometric equation and identitie
Find the value of x
$$\displaystyle{\cos{{35}}}\cdot=\frac{{21}}{{x}}$$

2020-12-28
$$\displaystyle{\cos{{35}}}=\frac{{21}}{{x}}$$
$$\displaystyle{\cos{{35}}}={0.819}=\frac{{21}}{{x}}$$
$$\displaystyle{x}=\frac{{21}}{{0.819}}$$
$$\displaystyle{x}={25.64}$$