sin(square)42°-sin square 12°
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Answered by
8
sin30
sin60.... ....
sin60.... ....
shahbaz29:
ans is under root 5 +1/18
sorry 8
Answered by
12
sin^2 42°-sin^2 12°=sin^2(42°-12°)
= sin^2(30°)
= sin^2(30°)
sorry but it's mistake
how
so plz u solve this
there is a formula for this
sin square A + sin square B = sin(A+B)*sin(A-B)
then sin square 42°+sin square12°=sin(42°+12°)sin(42°-12°)
= sin54°(sin30°)
=√5+1/4(1/2)
=√5+1/8
that is the answer
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