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Geometry Level 3

Let 1 1 be the answer to this question. Which of the following is equal to sin ⁡ x \sin x ?

sin ⁡ ( 3 x ) \sin(3x) sin ⁡ ( 4 x ) \sin(4x) sin ⁡ ( 2 x ) \sin(2x) sin ⁡ ( 5 x ) \sin(5x)

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Pi Han Goh by Pi Han Goh , 30, Malaysia

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2 solutions

Arya Kusuma
Mar 24, 2016

Since sin x = 1, we found that x is 90. Sin 5x = sin 450 = sin (360 + 90) = sin 90. So, the answer is sin 5x

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Nice! For completeness, you should show that the answer 3 answer choices can't be the answer.

Pi Han Goh - 5 years, 2 months ago
Nikhil Bhamwani
Mar 31, 2016

You already told dat 1 is d ans. .......so option 1 is correct.....😆😆

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