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Mathematics
Mathematics
Problem
Find the principal value of
θ
\theta
θ
in each case: (a)
sin
θ
=
−
3
2
\sin\theta=-\dfrac{\sqrt3}{2}
sin
θ
=
−
2
3
(b)
cos
θ
=
1
4
\cos\theta=\dfrac14
cos
θ
=
4
1
(c)
sin
θ
=
0.98
\sin\theta=0.98
sin
θ
=
0.98
(answer correct to two decimal places)
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