Asked by Anonymous
Find the exact value of sin75degrees using sum identity of sine
Answers
Answered by
Reiny
sin 75
= sin(45 + 30)
= sin45cos30 + cos45sin30
= (√2/2)(√3/2) + (√2/2)(1/2)
= (√6 + √2)/4
= sin(45 + 30)
= sin45cos30 + cos45sin30
= (√2/2)(√3/2) + (√2/2)(1/2)
= (√6 + √2)/4
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