Find all solutions
2cos(theta)+1=0
write in radians in terms of pi.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h