Page 76 - Math Grade 11 (Advance)

PROEUS DARA

. 2(x :rc) 2x
n. sm - - - < cos -
2 4 2

cosx l- cosx
j:l_ > -:---::---
1 + 2cosx l - 2cosx
li5. I - sinx < I + sinx '1
I - 3 sinx l - 9 sin x
2

- . 4 4 l
n. sm a+ cos a;;::
2
" . 6 6 1
"'· sm a + cos a ;;::
4
~ . 8 8 1 '1
... sm a + cos a ;;:: S

7. utn mmnb !).ABC tj:l(f12
U1 ""' ..
1

n. 2cos3x+ ,J3sinx+ COSX = 0
6 6 8
2. sin x+ cos\= 2(sin x+ cos x)
sin5x
j:l_ 5sinx = 1

3 3./i .
b. cos x+ sm2x-2cosx = 0
4

G. sinx + sin2x + sin3x + sin4x + sin5x + sin6x = 0 '1

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