Mathematics, 19.03.2021 23:50 lamanihill
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
Answers: 2
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Which sum or difference identity would you use to verify that cos (180° - q) = -cos q?
a. sin (a -b...
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