Answer:
What is the question?
Step-by-step explanation:
Tan(15) = tan(45 - 30)
= [tan(45) - tan(30) ] / [ 1 + tan(30)tan(45)]
= (1 - 1/sqrt(3)) /(1 + 1/sqrt(3))
= (sqrt(3) - 1)/(sqrt(3) + 1)
= (sqrt(3) - 1)^2 /(3 - 1)
= 1/2 [3 + 1 - 2sqrt(3) ]
= (2 - sqrt(3) )
= 0.27 is your answer
Answer and Explanation:
Suppose Waheeda needs x more dollars.
Right now, she has $15. She needs x more, so we add x to 15. The end result we hope to have is $75. So, the equation is:
x + 15 = 75
To solve, we simply subtract 15 from both sides: x = 75 - 15 = 60
Thus, she still needs $60.
Hope this helps!
