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Pertanyaan

Nilai dari cos 7 5 o − cos 1 5 o sin 10 5 o − sin 1 5 o ​ = ...

Nilai dari

  1. negative square root of 3

  2. -1

  3. 1 half

  4. 1 half square root of 3

  5. square root of 3

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A. Acfreelance

Master Teacher

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Pembahasan

R u m u s space p e n g u r a n g a n space sin u s space d a n space cos i n u s space a d a l a h colon  sin alpha minus sin beta equals 2 cos fraction numerator alpha plus beta over denominator 2 end fraction sin fraction numerator alpha minus beta over denominator 2 end fraction  cos alpha minus cos beta equals negative 2 sin fraction numerator alpha plus beta over denominator 2 end fraction sin fraction numerator alpha minus beta over denominator 2 end fraction  S e h i n g g a comma  fraction numerator sin 105 to the power of o minus sin 15 to the power of o over denominator cos 75 to the power of o minus cos 15 to the power of o end fraction equals fraction numerator 2 cos fraction numerator 105 plus 15 over denominator 2 end fraction sin fraction numerator 105 minus 15 over denominator 2 end fraction over denominator negative 2 sin fraction numerator 75 plus 15 over denominator 2 end fraction sin fraction numerator 75 minus 15 over denominator 2 end fraction end fraction  equals fraction numerator 2 cos 60 to the power of o sin 45 to the power of o over denominator negative 2 sin 45 to the power of o sin 30 to the power of o end fraction  equals fraction numerator 2 cross times 1 half cross times 1 half square root of 2 over denominator negative 2 cross times 1 half square root of 2 cross times 1 half end fraction  equals negative 1

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Pertanyaan serupa

Nilai dari cos 7 5 ∘ − cos 1 5 ∘ sin 10 5 ∘ − sin 1 5 ∘ ​ adalah.....

101

5.0

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