in chapter ten section two
all you have to is plug the problems into the formula. if your not using a formula then you are doing the problem WRONG!!
all you have to is plug the problems into the formula. if your not using a formula then you are doing the problem WRONG!!
the formulas
tan(alpha plus beta)= tan (alpha) + tan (beta) over 1-tan(alpha) tan(beta)
example
What is the exact value of tan(15º)? We can use a difference angle formula noticing that 15º = 45º - 30º.
| tan(15º) | = tan(45º - 30º) |
(tan45-tan30)= tan45-tan30
1+tan45tan30
tan(15)=(square root of 2)- one half
1+(square root of 2)(one half)
tan(15)=squared root 2-3
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