Describe the process of a trigonometry word problem

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?