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Without Using Trigonometric Tables, Prove That: Sin35° Sin55° − Cos35° Cos55° = 0 - Mathematics

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प्रश्न

Without using trigonometric tables, prove that:

sin35° sin55° − cos35° cos55° = 0

बेरीज
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उत्तर

LHS=sin35° sin55°cos35° cos55°

=sin35° cos(90°55°)cos35° sin(9055°)

=sin35° cos35°cos35° sin35°

=0

=RHS

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पाठ 7: Trigonometric Ratios of Complementary Angles - Exercises [पृष्ठ ३१३]

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आर. एस. अग्रवाल Mathematics [English] Class 10
पाठ 7 Trigonometric Ratios of Complementary Angles
Exercises | Q 3.4 | पृष्ठ ३१३
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