SOLUTION: explain how the exact value of sin 75* can be found using either sin(a+b)=sin a cos b + cos a sin b or sin(a-b)= sin a cos b-cos a sin b

Question 671982: explain how the exact value of sin 75* can be found using either sin(a+b)=sin a cos b + cos a sin b or sin(a-b)= sin a cos b-cos a sin b
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
explain how the exact value of sin 75* can be found using either sin(a+b)=sin a cos b + cos a sin b or sin(a-b)= sin a cos b-cos a sin b
**
For sin(a+b)
let a=45�
let b=30�
or
a=30�
b=45�
..
For sin(a-b)
let a=105�
let b=30�
or
a=30�
b=105�
..
higher 3-digit angles can be used, but that is seldom a requirement
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