cos (60-30)=cos60cos30+sin
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Answered by
2
Hi ,
It is incomplete ,
LHS = cos( 60 - 30 )
= Cos30°
= √3/2
RHS = cos60cos30 + sin60sin30
= ( 1/2) ( √3/2 ) + ( √3/2 ) ( 1/2 )
= √3/ 4 + √3/4
= 2( √3/4 )
= √3/2
Therefore ,
LHS = RHS
I hope this helps you.
:)
It is incomplete ,
LHS = cos( 60 - 30 )
= Cos30°
= √3/2
RHS = cos60cos30 + sin60sin30
= ( 1/2) ( √3/2 ) + ( √3/2 ) ( 1/2 )
= √3/ 4 + √3/4
= 2( √3/4 )
= √3/2
Therefore ,
LHS = RHS
I hope this helps you.
:)
Answered by
1
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