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प्रश्न
Evaluate the following: sin(35° + θ) - cos(55° - θ) - tan(42° + θ) + cot(48° - θ)
बेरीज
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उत्तर
sin(35° + θ) - cos(55° - θ) - tan(42° + θ) + cot(48° - θ)
= sin[90° - (55° - θ)] - cos(55° - θ) - tan[90° - (48° - θ)] + cot(48° - θ)
= cos(55° - θ) - cos(55° - θ) - cot(48° - θ) + cot(48° - θ)
= 0.
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