Question

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

Answer 1

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.

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Answer 2

Concept

Sin 7 degrees is the value of the sine trigonometric function for an angle equal to 7 degrees. The value of sin 7° is 0.1219

A value of cos 7 degrees can be calculated by making an angle of 7° with the x-axis and then finding the coordinates of the corresponding point (0.9925, 0.1219) on the unit circle. The cos 7° value is equal to the x-coordinate (0.9925). ∴ cos 7° = 0.9925.

Given

(sin7+cos7) is given

Find

We need to find the value of (sin7+cos7) and check whether it is a negative real number or not

Solution

Sin7 - Cos7

= 0.1219 - 0.9925

= - 0.8706 and it is a negative real number

Hence the value of (sin7+cos7) is - 0.8706 which is a negative real number

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