Page 109 - Math SL HB Sem 1

CIRCULAR FUNCTIONS AND I'RIGONOME'TRY

Example 4: Simplify sindcos 1o -"o,B.i,fz and hence find the sma est positive
ff
value of d for which the expression has a minimum value.

Example 5: If tan d : 1 , d is acute, find the exact values of tan Z0 andtan40
4

7 3n I I
Example 6: If cos A tt < A< , find the values olsin
25' 2 2 2
1
ur,l tun A
2

.+-)L