Discussion

Question:

If 5° ≤ x° ≤ 15°, then the value of sin 30° + cos x° - sin x° will be:

Explanation:

sin 30° + cos x° – sin x° where 5° ≤ x° ≤ 15°.

For the given range, cos x > sin x

So, cos x° – sin x° > 0

Also, sin 30° = 0.5

sin 30° + cos x° – sin x° > 0.5

So, first four options are eliminated.

Hence, option (e).

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