Math 12
posted by Anonymous .
Simplify #1:
cscx(sin^2x+cos^2xtanx)/sinx+cosx
= cscx((1)tanx)/sinx+cosx
= cscxtanx/sinx+cosx
Is the correct answer cscxtanx/sinx+cosx?
Simplify #2:
sin2x/1+cos2X
= ???
I'm stuck on this one. I don't know what I should do.
Simplify #3:
cosxsin(90x)sinx/cosxcos(180x)tanx
= cosx(sin90cosxcos90sinx)sinx/cosx(cos180cosx+sinx180sinx)tanx
= cosxsin90cosx+cos90sinxsinx/cosxcos180cosxsinx180sinxtanx
= cosxsin90cosx+cos90sin^2x/cosxcos180cosxsinx180sinxtanx
= ???
What do I do next?
Please help and Thank you

#1:
Identities:
cscx = 1/sinx
tanx = sinx/cosx
Your answer can be simplified further using the above identities.
#2:
This one looks simplified as is.
#3:
I'll let someone else help you with this one.