# How do you express #sin(pi/ 6 ) * cos( (3 pi) / 2 ) # without using products of trigonometric functions?

So:

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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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- Use the product-to-sum formulas to rewrite the product as a sum or difference. 9 cos(−9β) sin 5β?
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