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प्रश्न
Use tables to find cosine of 65° 41’
संख्यात्मक
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उत्तर
cos 65° 41’ = cos (65° 36’ + 5’)
= 0.4131 − 0.0013
= 0.4118
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अध्याय 21: Trigonometrical Identities - EXERCISE 21 (D) [पृष्ठ ३३९]
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