Question

sin 2x - cos 2x find maximum and minimum values
I want answer fast !!!! ​

Answer 1

( grade 10)

we know the values of 0, 30,45,60,90 degree

so if we see 30 and 60

then 30.2 =60

so sin 2.30-cos2.30

=sin60-cos60

(put value take out ans)

similarly

0.2=0

and 45.2=90

put in with cos and sin

sin0-cos0

and sin90-cos90

solve and you can find your ans