boss1373
22.07.2019 •
Mathematics
Which expression completes the identity cos u sin v = ? a. 1/2[sin(u+v)+sin(u-v)] b. 1/2[cos(u-v)+cos(u+v)] c. 1/2[sin(u+v)-sin(u-v)] d. 1/2{cos(u-v)-cos(u+v)]
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Ответ:
The second and easier option is to just remember the formulas of product to sum conversion identities. The 4 formulas for this case are listed below in the image.
Since we have the product of cos and sin, the sum will involve two sine functions connected by addition.
So the correct answer is option A
Ответ:
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Step-by-step explanation:
and y=2x+5