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3 years ago

Evaluate and simplify tan 15º.

1 answer:

6 0

Tan(15) = tan(45 - 30)

= [tan(45) - tan(30) ] / [ 1 + tan(30)tan(45)]

= (1 - 1/sqrt(3)) /(1 + 1/sqrt(3))

= (sqrt(3) - 1)/(sqrt(3) + 1)

= (sqrt(3) - 1)^2 /(3 - 1)

= 1/2 [3 + 1 - 2sqrt(3) ]

= (2 - sqrt(3) )

= 0.27 is your answer

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3 years ago

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2 years ago

A phone sells for $245. It is now on sale for 20% off the original price. How many dollars off is the phone?

Marysya12 [62]

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B $49

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2 years ago

Given the relation {(1, 4), (3, 6), (5, 4), (1, 8)},

skelet666 [1.2K]

Answer:

The domain of relation is {1,3,5}

It is not a function.

Step-by-step explanation:

Given the relation {(1, 4), (3, 6), (5, 4), (1, 8)}

We need to find the domain and determine if the given relation is function or not.

The domain of relation is {1,3,5}

But the given relation is not function because we have x=1 twice in the relation and the for the relation to be function the values of domain can't be repeated.

So, It is not a function.

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3 years ago