sin 60° + cos (3x -9") = 1
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Answer:
⇒
sin
x
cos
60
−
cos
x
sin
60
−
cos
30
cos
x
−
sin
30
sin
x
=
1
⇒
sin
x
2
−
√
3
2
⋅
cos
x
−
√
3
2
⋅
cos
x
−
sin
x
2
=
1
⇒
−
2
√
3
2
⋅
cos
x
=
1
=
cos
x
(
−
√
3
)
=
1
⇒
cos
x
=
−
1
√
3
=
k
Step-by-step explanation:
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