1. No, cos π/16 ≠ -cosπ/16, what you probably meant is cos π/16 = cos (-π/16)
2. yes
3. yes
4. yes
Question: State an equivalent Trigonometric Ratio for each of the following
a) cos π/16
b) sin 7π/9
c) tan 5π/4
d) sin 11π/6
My (attempted) answers are:
a) -cos π/16
b) sin 2π/9
c) tan π/4
d) -sin π/6
Are any of my attempted answers correct?
1 answer