What is cos(pi/2+pi n/2) ?

The solution to cos(pi/2+pi n/2) is -sin((pin)/2)

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simplify cos(pi/2+pi n/2)

simplify

cos (\frac{π}{2} + π \frac{n}{2})

- sin (\frac{πn}{2})

Solution steps

cos (\frac{π}{2} + π \frac{n}{2})

Rewrite using trig identities

= - sin (\frac{πn}{2})

cos (3 t - \frac{π}{2})

cos (3 x + \frac{π}{4})

27.85 sin (12.78 t + 0.569)

tan (\frac{3 π}{2} - θ)

sin (arctan (\frac{r}{h}))