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natali 33 [55]
3 years ago
12

20 POINTS

Mathematics
1 answer:
USPshnik [31]3 years ago
4 0

Answer:

a) Only the first one is an identity.

Step-by-step explanation:

1). 8 cos O tan O csc O = 8   simplifies to:

cos O tan O csc O = 1

cos O * (sin O / cos O) * (1 /sin O)

=  cos O sin O / cos O sin O

= 1

So it is identity.

2) 13 sec^2 O/ cos^2 O - tan^2 O / cos^2O

= 13 sec^2 O - tan^2 O / cos^2 O

Now  sec^2 O = 1 + tan^2 O, so we have:

(13( 1 + tan^2 O) - tan^2 O) / cos^2 O

= (12 tan^2 O + 13) / cos^2 O

This is not always = 2 so its not an identity.

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Answer:

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Step-by-step explanation:

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3 years ago
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Westkost [7]

Answer:

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6 0
3 years ago
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r-ruslan [8.4K]
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Slav-nsk [51]

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Step-by-step explanation:

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inn [45]
We are given with
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3 years ago
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