Addition and subtraction formulas for sine, cosine and tangent.




Use the addition and subtraction formulas for sine, cosine and tangent to calculate the following expressions:

1:



cos(x)∙ sin(y)

cos(x)∙ cos(y)

cos(x)

sin(y)




2:



tan(x)

cot(x)

sin(x)

cos(x)



3:



sec(x)

tan(x)

cos(x)

sin(x)




4:



tan(x)

0

cos(x)

sin(x)




5:













6:













7:



sin(x)

sin(x) + cos(x)

sec(x)

tan(x)



8:



-tan(x)

tan(x)

1 - tan(x)

cot(x)





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