What is cos(pi/2 y-pi/2) ?

The solution to cos(pi/2 y-pi/2) is sin((piy)/2)

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simplify cos(pi/2 y-pi/2)

simplify

cos (\frac{π}{2} y - \frac{π}{2})

sin (\frac{π y}{2})

Solution steps

cos (\frac{π}{2} y - \frac{π}{2})

Rewrite using trig identities

= sin (\frac{π y}{2})

cos (- 7 t)

sin (54 0^{\circ} - x)

cos (arctan (x + 2))

- tan (- x)

3 sin (5 x - \frac{π}{2})