Asked Jan 11, 2020

Use the addition formulas to derive the identities in Exercises 31–36.

31. cos (x-pai/2)=sinx 

32. cos (x + pai/2)=-sinx

33. sin (x + pai/ 2 ) = cos x 

34. sin (x - pai/ 2) = - -cos x 

35. cos (A - B) = cos A cos B + sin A sin B   

36. sin (A - B) = sin A cos B - cos A sin B


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Step 1

Hey, since there are multiple questions posted, we will answer first 4 questions. If you want any specific question to be answered then please submit that question only or specify the question number in your message.

Step 2

Recall the addition formulas as follows.

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Step 3


Calculus homework question answer, step 3, image 1

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