Prove that 1
1
1 2
+
+ = cot
sin . θ
cosecθ θ

Can i get some on 18,20,& 22? or one of them

The measure of the angles of triangle abc are given by the expressions in the table. angle-measure a-48 degrees b-(6x-28)degrees c- (2x) degrees find the value of x. then find the measures of angles b and c. enter your answers in the boxes. x= m m

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section