What is -LSB- math -RSB- \ lim _ -LCB- x \ to 0 -RCB- \ frac -LCB- \ sin ^ 2 x -RCB- -LCB- x -RCB- -LSB- / math -RSB- ?
What is -LSB- math -RSB- \ displaystyle \ lim _ -LCB- x \ to 0 -RCB- \ frac -LCB- x - \ tan x -RCB- -LCB- x - \ sin x -RCB- -LSB- / math -RSB- ?