If \( \cos x=-\frac{\sqrt{13}}{7}, x \) in Quadrant III, then find (without finding \( x \) ) : \( \sin (2 x)=\square \) \( \cos (2 x)=\square \) \( \tan (2 x)=\square \)

Thid an angle 9 coterminal to \( 1066^{\circ} \), where \( 0^{\circ} \leq 0<360 \)

Solve \( 8 \sin (6 x)=7 \) for the two smallest positive solutions \( A \) and \( B \), with \( A<B \) \( A=\square \) \( B=\square \) Give your answers accurate to at least two decimal places.

Which is the correct identity for cos? \( \cos \theta=\frac{h}{a} \) \( \cos =\frac{h}{a} \) \( \cos \theta=\frac{a}{h} \) \( \cos =\frac{a}{h} \)

Corvert the following angle from degrees to radians. Express your answer in simplest form.

If \( \cos (\alpha+\beta)=0 \) then \( \sin (\alpha+2 \beta) \)