हिंदी

Evaluate: Sin (90° - A) Sin a - Cos (90° - A) Cos a

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प्रश्न

Evaluate: sin (90° - A) sin A - cos (90° - A) cos A

योग
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उत्तर

sin (90° - A) sin A - cos (90° - A) cos A
= cos A sin A - sin A cos A
= 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. (i) | पृष्ठ ३३४
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