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Vienkāršojiet izteiksmi sin70° cos25° - cos70° sin25°

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Vienkāršojiet izteiksmi sin70° cos25° - cos70° sin25°

sin(25° - 70°) = - sin45° = $negative fraction numerator square root of 2 over denominator 2 end fraction$

sin(70° - 25°) = sin 45° = $fraction numerator square root of 2 over denominator 2 end fraction$

sin( 70° + 25°) = sin95°

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