2.4 Sum and Difference Formulas - Problem Check-in

cos (A - B)= (leave no spaces in answer)

Tags

CCSS.HSF.TF.C.9

• A
• B
• C
• D

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CCSS.HSF.TF.C.9

Fill in the rest after the plus sign (no spaces):

sin(A+B)=sinAcosB +

Tags

CCSS.HSF.TF.C.9

If  $\sin\alpha=\frac{5}{13}$  and  $\cos\beta=\frac{4}{5}$  (both in QI), then find  $\sin\left(\alpha-\beta\right)$  

•  $\frac{16}{65}$  

•  $-\frac{16}{65}$  

•  $\frac{65}{16}$  

•  $-\frac{65}{16}$  

Tags

CCSS.HSF.TF.C.9

sin (A - B) = (leave no spaces when typing answer)

Tags

CCSS.HSF.TF.C.9

Find the exact value.
cos (5π/18 - π/9)

• √(3)/2
• 1/4
• 1/2
• 1

Tags

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9

cos (A + B)= (leave no spaces in answer)

Tags

CCSS.HSF.TF.C.9

Use a sum or difference formula to find an exact value of sin 105º

Tags

CCSS.HSF.TF.C.9