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Mathematics, 21.06.2019 22:00
Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b
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Mathematics, 21.06.2019 22:30
Fast! find the length of cu. the triangles are similar. show your work.
Answers: 2
Cos 25° + sin 25°/cos 25° - sin 250 = tan 70°...
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