Answer:
Step-by-step explanation:

Answer:
55
Step-by-step explanation:
5(3)^2+4(2.5)
5(9)+4(2.5)
45+10
55
Answer:
D good luck :) also have a great day
Step-by-step explanation:
Let the no. be x




Therefore , the no. is 390
<h3>Answer:</h3>
sec²(x)
<h3>Explanation:</h3>
As required:
... = (sin²(x)/cos²(x))(1 +(cos²(x)/sin²(x))
... = (sin²(x)·(sin²(x)+cos²(x)) / (cos²(x)·sin²(x))
... = 1/cos²(x) = sec²(x)
_____
Alternatively, multiply out the given expression, then use trig identities.
... = tan²(x) + (tan(x)·cot(x))² = tan²(x) +1 = sec²(x)