How do you find the exact value of the expression by using appropriate identities sin(79)cos(49)-cos(79)sin(49)

Hana Buck 2022-09-18 Answered
How do you find the exact value of the expression by using appropriate identities sin ( 79 ) cos ( 49 ) cos ( 79 ) sin ( 49 )?
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Answers (1)

Abdiel Nelson
Answered 2022-09-19 Author has 4 answers
Using the identity
sin ( α β ) = sin ( α ) cos ( β ) cos ( α ) sin ( β )
sin ( 79 ) cos ( 49 ) cos ( 79 ) sin ( 49 ) = sin ( 79 49 )
= sin ( 30 )
= 1 2

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