# How do you find the exact functional value tan 7pi/12 using the cosine sum or difference identity?

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To find the exact functional value of tan(7π/12) using the cosine sum or difference identity, you can first express tan(7π/12) in terms of sine and cosine using the identity tan(θ) = sin(θ) / cos(θ). Then, you can use the angle addition formula for cosine, which states that cos(A + B) = cos(A)cos(B) - sin(A)sin(B), where A = 3π/4 and B = π/3. After substituting the values, simplify the expression to find the exact value of tan(7π/12).

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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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