prove that: (sin 30+cos 30)(sin 60-cos 60)=1/2
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Answered by
3
Answer:
proved
Step-by-step explanation:
LHS
=(cos30+sin30)(cos30-sin30)
we know that sin 60 = cos 30 and I wrote the first term as it is
and by applying (a+b)(a-b)=a²-b²
=cos²30-sin²30
=(√3/2)²-(1/2)²
=3/4 - 1/4
=2/4
=1/2
=RHS
Answered by
0
Answer:
Step-by-step explanation:
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