Posted by Anonymous on Tuesday, November 6, 2012 at 10:27am.
Find the exact value of sin75degrees using sum identity of sine

Math  Reiny, Tuesday, November 6, 2012 at 11:12am
sin 75
= sin(45 + 30)
= sin45cos30 + cos45sin30
= (√2/2)(√3/2) + (√2/2)(1/2)
= (√6 + √2)/4