1 15 15= =4 4 8SIN 2 210X XTAN 20

2. .

1 15

15

=

=

4 4

8

sin 2

210

x

x

tan 2

0.5

cos 2

28

=

x

=

x

x

x

x

x

R

=

x

=

1 sin16

.

b)

sin 2 .cos 2 .cos 4 .cos8

8 cos

cos

x

=

æ

ç

ç

çè

p

-

x

ö

÷

÷

÷

ø

=

x

Þ

R

=

sin16

sin

cos

1

2

8