1+tan^2(x) = sec^2(x)
sec^2(x) = 1/cos^2(x)
csc(-x) / 1/cos^2(x) =
cos^2(x) csc(-x)
Answer:
x=0.25 or -1/4
Step-by-step explanation:
120x + 21 = -9
120x = -30 (-21 from both sides of equation)
x = -0.25 or -1/4 (divide 120 from both sides of equation)
Answer: 11 degrees Celsius
