Fill in the blanks: 1. If \( \tan x=-0.5 \) then \( \tan (-x)=\square \) 2. If \( \sin x=0.9 \) then \( \sin (-x)=\square \) 3. If \( \cos x=0.4 \) then \( \cos (-x)=\square \)

Solve \( 2 \cos ^{2}(x)-3 \cos (x)-5=0 \) for all solutions. \( x=\square \) where select an answer Give your answer as an exact value.

Prove that: \( \frac{\sin A+\sin 2 A}{1+\cos A+\cos 2 A}=\tan A \)

Which points are the same as \( \left(15,11^{\circ}\right) \) ? Check all that apply. \( \begin{array}{ll}\left(15,191^{\circ}\right) & \left(15,-349^{\circ}\right) \\ \left(15,371^{\circ}\right) & \left(-15,191^{\circ}\right)\end{array} \)

Solve \( 2 \cos ^{2}(t)-3 \cos (t)+1=0 \) for all solutions. \( t=\square+2 k \pi \); Select an answer Give your answers as exact values in a list separated by commas. \( > \) Next Question

1. Un triangolo rettangolo con gli angoli acuti di \( 30^{\circ} \) e \( 60^{\circ} \) ha l'ipotenusa lunga 50 m . \( \rightarrow \) Calcola la lunghezza dei cateti. \( \quad[25 \mathrm{~m} ; 43 \mathrm{~m}] \)