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Natali [406]
3 years ago
5

Tan^2 70° -sec^2 70°​

Mathematics
1 answer:
kipiarov [429]3 years ago
4 0

Answer:

-1

Step-by-step explanation:

We need to find the value of tan² 70° -sec² 70°​.

We know that,

\sec^2\theta-\tan^2\theta=1 ...(1)

We can write the given expression as :

tan² 70° -sec² 70° = -(-tan² 70° +sec² 70°)

=-(sec² 70°-tan² 70°)

Using identity (1)

=-(1)

= -1

Hence, the value of the given expression is -1.

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after a dose of an antibiotic, the number of bacteria decreases. If the equation is y=27,000(1/3) models this "decay" situation,
iren2701 [21]

Answer:

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4 0
3 years ago
Mr. Jackson orders lunches to be delivered to his workplace for himself and some coworkers. The cost of each lunch is $6.25. Wha
kap26 [50]

The question is incomplete, here is the complete question.

Mr. Jackson orders lunches to be delivered to his workplace for himself and some coworkers. The cost of each lunch is $6.25. There is also a one-time delivery fee of $3.50. What expression could Mr. Jackson use to find the cost of ordering n lunches

Answer:

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Step-by-step explanation:

Mr. Jackon orders lunch for his coworkers and himself at the cost of $6.25

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