Question

Select the functions that have a value of 1.

Answer 1

Answer:

$\displaystyle csc\:90°, sin\:90°$

Explanation:

You need to know the Unit Circle in order to figure this out.

Extended Information on Trigonometric Identities

$\displaystyle \frac{y}{r} = sin\:θ$

$\displaystyle \frac{x}{r} = cos\:θ$

$\displaystyle \frac{y}{x} = tan\:θ$

$\displaystyle \frac{r}{x} = sec\:θ$

$\displaystyle \frac{r}{y} = csc\:θ$

$\displaystyle \frac{x}{y} = cot\:θ$

Where r is the length of the radius

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