Given triangle is a right angle triangle so we are allowed to use trigonometric formulas.
We want to find Hypotenuse using angle A and base 7 cm
so right choice is to use cosine
Hence value of side AB is approx 7.72 cm.
Answer: {f(x)∈R∣f(x)≥0}
Step-by-step explanation: The square root function never produces a negative result. Therefore, for the function f(x)=√x+5 , the domain is {x∈R∣x≥−5} and the range is {f(x)∈R∣f(x)≥0} .