91Ó°ÊÓ

In Exercises 19-36, solve each of the trigonometric equations exactly on \(0 \leq \theta<2 \pi\). $$ 4 \csc (2 \theta)+8=0 $$

In Exercises \(25-36\), use a calculator to evaluate each expression. Give the answer in degrees and round to two decimal places. $$ \cos ^{-1}(0.5432) $$

In Exercises 1-36, solve each of the trigonometric equations exactly on the interval \(0 \leq x<2 \pi\). $$ \cos (2 x)+\cos x=0 $$

In Exercises 19-36, solve each of the trigonometric equations exactly on \(0 \leq \theta<2 \pi\). $$ \sqrt{3} \cot \left(\frac{\theta}{2}\right)-3=0 $$

In Exercises \(25-36\), use a calculator to evaluate each expression. Give the answer in degrees and round to two decimal places. $$ \arccos (-0.3245) $$

In Exercises 19-36, solve each of the trigonometric equations exactly on \(0 \leq \theta<2 \pi\). $$ \sqrt{3} \sec (2 \theta)+2=0 $$

In Exercises 1-36, solve each of the trigonometric equations exactly on the interval \(0 \leq x<2 \pi\). $$ 2 \cot x=\csc x $$

In Exercises 1-36, solve each of the trigonometric equations exactly on the interval \(0 \leq x<2 \pi\). $$ 2 \sin ^{2} x+\sin (2 x)+\cos (2 x)=0 $$

In Exercises \(25-36\), use a calculator to evaluate each expression. Give the answer in degrees and round to two decimal places. $$ \arcsin (0.1223) $$

In Exercises 19-36, solve each of the trigonometric equations exactly on \(0 \leq \theta<2 \pi\). $$ \tan ^{2} \theta-1=0 $$