Use SOH CAH TOA
sin(x) = opp/hyp
cos(x) = adj/hyp
tan(x) = opp/adj
sin(x) = 3.9/8.1
sin(x) = 0.481
Inverse sin of 0.481 = 28.8 degrees
Each answer should be between 0 and 90 :)
70+68= 138
138 is the answer because by the triangle sum theorem says all the inside angles of a triangle equal 180 degrees and a straight line is 180 degrees so to find x you just must add up the other two sides of the triangle
She would answer 20 or 30 questions
Answer: 345;275
Step-by-step explanation:
Lest say v_1 the speed of the slowest plane
v_2 the speed of the fasterst plane