# How do you verify #2csc2x=secxcscx#?

Use the double angle formula :

as necessary.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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- How do you prove # (cosA - cotA) / ( 1 - sinA) = - cotA#?
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- How do you express #sin(pi/ 6 ) * cos( ( pi) / 8 ) # without using products of trigonometric functions?

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