Answer:
8.1.
Step-by-step explanation:
a^2+b^2=c^2
8^2+2^2=c^2
64+4
68
and you square root it and get 8.2 so i giras is 8.1
hope it helps.
0<=x0.7896
0<=x<0.9799
0<=x<0.9870
0<=x<1.2249
Just simplify!!
EXample: 11 over 8
11
8
=
1 and 3 over 8
1
3
=1.375
(using 
)
so we can replace the sin²x in the LHS expression as follows
which is the RHS.