An isosceles triangle has base angles that each measure 42∘. Which equation can be used to find z, the measure of the third angle of this isosceles triangle in degrees?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

If value of cos330° is √3/2 then find tan165°.