Easy -1.2 This is a straightforward trigonometric equation requiring only basic manipulation (recognizing sin²x = 1 means sin x = ±1) and recall of special angle values. The question is simpler than average A-level content as it involves no multi-step problem-solving, just direct application of fundamental trig knowledge to find two solutions in the given range.
Question 5:
5 | Obtains s i n x = 1
Or
Obtains c o s x = 0
PI by a correct value for x
Condone radians and values
outside of range | 1.1a | M1 | sinx =1
x =90 ,270
Obtains 90 or 270
Or
3
Obtains both and
2 2 | 1.1b | A1
Obtains 90 and 270 and no
other values in the range. | 1.1b | A1
Question 5 Total | 3
Q | Marking instructions | AO | Marks | Typical solution