Question

Need help with some trig problems

Answer 1

@jim_thompson5910

Answer 2

Use the identity

cos(A - B) = cos(A)*cos(B) + sin(A)*sin(B)

Answer 3

you're given tan(B). Use that to find the value of sin(B)

Answer 4

wait we are solving question number 1 right

Answer 5

yes

Answer 6

ok how do I do that

Answer 7

draw a right triangle with the angle beta

Answer 8

if tan(B) = -1/2, then what does that mean for the right triangle above?

Answer 9

ok one sec

Answer 10

sin is \[\sqrt{5}/5\]

Answer 11

correct