sin (60+a) - cos (30+a)
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Answered by
9
sin(60+a) - cos(30+a)
= sin60•cosa + cos60•sina - cos30•cosa + sin30•sina
= √3/2×cosa + 1/2×sina - √3/2×cosa + 1/2×sina
= 2(1/2)sina
= sin a
= sin60•cosa + cos60•sina - cos30•cosa + sin30•sina
= √3/2×cosa + 1/2×sina - √3/2×cosa + 1/2×sina
= 2(1/2)sina
= sin a
Answered by
3
(sin60 +sina)-(cos30+cosa)
(√3/2+sina)-(√3/2+cosa)
sina +cosa
sin(90-a)+cosa
90-a+a=90
(√3/2+sina)-(√3/2+cosa)
sina +cosa
sin(90-a)+cosa
90-a+a=90
nishant45:
but here i have not used formula
without that... it cannot be solved
plz check it
i had opened brackets only
leave it buddies.. anyways we got the answer na :)
and it gives value
90°
and what is the answer
hm
sina
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