How do I prove that (sin7+cos7) is not a negative real number?

1.	How do I prove that (sin7+cos7) is not a negative real number?
Answer» ANSWER: On the outline political map of India locate and label the following: - 1. The group of islands lying in Arabian sea. 2. Locate any three STATES through which tropic of Cancer passes. 3. The group of islands lying in BAY of Bengal. --------------------------X-------------X-------------X------------X---------------X

Answer»

ANSWER:

On the outline political map of India locate and label the following: -

1. The group of islands lying in Arabian sea.

2. Locate any three STATES through which tropic of Cancer passes.

3. The group of islands lying in BAY of Bengal.

--------------------------X-------------X-------------X------------X---------------X

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How do I prove that (sin7+cos7) is not a negative real number?​

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How do I prove that (sin7+cos7) is not a negative real number?