what is the exact value of sin 75°?
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-0.38778163541 is the accurate value for sin 75
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Sin(A+B) =sinA cos B+ cosA sinB
sin 75°= sin(45°+30°)
=sin45cos 30+ cos45 sin30
=(1/✓2×✓3/2) +( 1/✓2×1/2)
(✓3/2✓2)+(1/2✓2)
(✓3+1) /2✓2
sin 75°= sin(45°+30°)
=sin45cos 30+ cos45 sin30
=(1/✓2×✓3/2) +( 1/✓2×1/2)
(✓3/2✓2)+(1/2✓2)
(✓3+1) /2✓2
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