prove that........ sin(5π/12)=√3+1/2√2
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Hi Mate!!!
Sin ( 90 - 15 ) = Cos ( 15 )
Now Cos ( 15 ) = Cos( 45 - 30) = Cos ( 45 ) × Cos ( 30 ) +Sin ( 45 ) Sin ( 30)
Cos (15) = ( 1 √2 ) × ( √3/2 ) + (1/√2 ) ( 1/2)
Cos (15) = √3 +1 / 2√2
Have a nice day
Sin ( 90 - 15 ) = Cos ( 15 )
Now Cos ( 15 ) = Cos( 45 - 30) = Cos ( 45 ) × Cos ( 30 ) +Sin ( 45 ) Sin ( 30)
Cos (15) = ( 1 √2 ) × ( √3/2 ) + (1/√2 ) ( 1/2)
Cos (15) = √3 +1 / 2√2
Have a nice day
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