2
–1
–1
2
2
1
2
1
tan
sin
cos
2
1
1
x
y
x
y


−
+


+
+


, |x | < 1, y > 0 and xy < 1
Rationalised 2023-24
 30
MATHEMATICS
Find the values of each of the expressions in Exercises 16 to 18 10 –1
2
sin
sin 3
π






11 –1
3
tan
tan 4
π






12