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Question
The value of sin 50° – sin 70° + sin 10° is ______.
Options
0
1
`1/2`
`1/sqrt(2)`
MCQ
Fill in the Blanks
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Solution
The value of sin 50° – sin 70° + sin 10° is 0.
Explanation:
sin 50° + sin 10° – sin 70°
= 2 sin 30° cos 20° – cos 20°
= `cos 20^circ (2 xx 1/2 - 1)`
= 0
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Conversion Formulae in Trigonometry
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