Sum and Difference Identities Answers

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 bb.cos (a -b) = cos a cos b – sin a sin bc.cos (a -b) = cos a cosb + sin a sin bd.sin (a + b) = sin a cos b + cos a sin b

Find the exact value of .a.c.b.d.

Find the exact value of cos 15°.a.b.c.d.

Assume that and . Find the exact value of if and . a.c.b.d.

Find the exact value of sin 105°. a. b. c. d. Please select the best answer from the choices provided

Find the exact value of .a.c.b.d.

Which sum or difference identity would you use to verify that sin (90° + q) = cos q?a.cos (a -b) = cos a cos b + sin a sin bb.sin (a +b) = sin a cos b + cos a sin bc.sin (a -b) = sin a cos b- cos a sin bd.cos (a +b) = cos a cos b - sin a sin b

Analysis of the voltage in certain types of circuits involves terms of the form , where n is a positive integer, is the frequency of the voltage, and t is time. Use an identity to simplify this expression.a.c.b.d.

Find the exact value of .a.c.b.d.

Assume that and . Find the exact value of if and . a.c.b.d.