Question

Use sum or difference identities to find the exact value of each trigonometric function:
sinpie/2

Answer 1

\[\sin(\frac{\pi}{2})\]?

Answer 2

yeah

Answer 3

you do not need an identity for this one, you should know this right off the bat

Answer 4

sine is the second coordinate

Answer 5

find two angles that add up to pi/2 (or difference = pi/2)
\[\large\rm Sin(a-b)=\sin a \cos b - \cos a \sin b\]
2pi -3pi/2 = pi/2
\[\sin (2\pi -\frac{3\pi}{2}) = \sin 2\pi \cdot \cos \frac{3\pi}{2}- \cos2 \pi \cdot \sin \frac{3\pi}{2}\]
solve

Answer 6

hang this on wall
you still have to use unit circle but i think ur teacher wants to see the work

Answer 7

ok thanks

Answer 8

yw