हिंदी

Evaluate: Sin2 35° - Cos2 55°

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प्रश्न

Evaluate: sin2 35° - cos2 55°

योग
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उत्तर

sin2 35° - cos2 55°
= sin2 35° - [cos(90° - 35°)]2
= sin2 35° - sin2 35°
= 0

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अध्याय 21: Trigonometrical Ratios [Sine, Consine, Tangent of an Angle and their Reciprocals] - EXERCISE 21 (F) [पृष्ठ ३३४]

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सेलिना Concise Mathematics [English] Class 9 ICSE
अध्याय 21 Trigonometrical Ratios [Sine, Consine, Tangent of an Angle and their Reciprocals]
EXERCISE 21 (F) | Q 3. (ii) | पृष्ठ ३३४
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