What is (1-cos(t))-(1-cos(t-pi)) ?

The solution to (1-cos(t))-(1-cos(t-pi)) is -2cos(t)

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simplify (1-cos(t))-(1-cos(t-pi))

simplify

(1 - cos (t)) - (1 - cos (t - π))

- 2 cos (t)

Solution steps

(1 - cos (t)) - (1 - cos (t - π))

Rewrite using trig identities

= 1 - cos (t) - (1 - (- cos (t)))

Simplify

1 - cos (t) - (1 - (- cos (t))) : - 2 cos (t)

= - 2 cos (t)

cos (a + \frac{π}{2})

10 cos (120 π t + 3 0^{\circ})

sin (2 (π + x)) - cos (π + x)

1 - tan (x + \frac{π}{3})

4 sin (x - \frac{π}{2})

What is (1-cos(t))-(1-cos(t-pi)) ?
The solution to (1-cos(t))-(1-cos(t-pi)) is -2cos(t)