Solve over Real numbers:

a)5sin^2t+cos^2t-2=0 b)sec^2t+tantt=7 c)root of sint=2sint-1 d)tant-sintcost=0

Solve over [0, 2pi[ :

e)sin^2x-cos^2x=0 f)2tan^2x+3tanx-5=0 g)2sin^2x-sinx-1=0 h)6cos^2x+5cosx=0

solve:

2(cos(3x-pi)+2=1 "x" element of reals

if "x" element [0 degrees,180degrees] solve 4sin2(x-5)=1

Find the exact value:

cosx=-1/3 pi/2<0<pi

evaluate

sin2x tan2x