Cosx= sin(90-x)
From the RHS,
sin(90-x)= sin90cosx-cos90sinx
Since sin90=1, cos90=0
sin90cosx-cos90sinx=cosx-0=cosx (proven)
I guesstimated and checked my answer to get 37.
37 + 38 + 39 + 40
Answer:
Add 3x to both sides
Step-by-step explanation:
after you add 3x you get 11=3x+44
next you subtract 44 from each side
you then get -33=3x then you divide by 3 on both sides and your final answer is x= -11
