Choose the one alternative that best completes the statement

Choose the one alternative that best completes the statement or answers the questions. Use a combinational angle to find the exact value of the expression, Do not use a calculator. Sin 330 degree 1/2 rot 3/2 2 2 root 3/3 Use fundamental isenties angular the complementary angle thermo to find the exact value of the expression Do not Use a calculator. Sin 20 degree cos 20 degree -1 0 20 1 Find the exact value Do not use a calculator. Tan 45 degree root 2 root 3/2 root 2/2 1 Find the reference angle of the given angle. -42 pie/8 pie/8 pie/2 pie/3 pie/4 Find the exact value of the expression Do not use a calculator csc (5 pie/2)-sec (-7 pie/3) 3 1 -3 -1 cot 45 degree - cos 30 degree -root 3/6 2 root 3-3 root 2/6 2- root 2/2 2- root 3/2 tan pie/6 - sin pie/3 -root 6/2 root 3 2 root 3 - 3 root 2/6 - root 3/6

Solution

1.) sin -330

sin(-x) = -sin(x)

so, - sin 330= - sin(360-30) = sin(360-30) as sin(360x)=sin(x)

= sin 30=1/2=0.5