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

Hana Buck

Hana Buck

Answered question

2022-09-18

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

Answer & Explanation

Abdiel Nelson

Abdiel Nelson

Beginner2022-09-19Added 6 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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