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Question
sin2 17.5° + sin2 72.5° is equal to ______.
Options
cos2 90°
tan2 45°
cos2 30°
sin2 45°
MCQ
Fill in the Blanks
Solution
sin2 17.5° + sin2 72.5° is equal to tan2 45°.
Explanation:
sin2 17.5° + sin2 72.5°
= sin2 17.5° + cos2 17.5° ...[∵ sin (90° – θ) = cos θ]
= 1
= tan2 45°
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Trigonometric Functions of Allied Angels
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