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NDA · Maths · Trigonometric Equations
NDA Trigonometric Equations — Formulas 1
Question
1
of 14
1.
What is the general solution of
cos
θ
=
cos
α
\cos\theta=\cos\alpha
cos
θ
=
cos
α
?
A
θ
=
n
π
+
(
−
1
)
n
α
\theta=n\pi+(-1)^n\alpha
θ
=
nπ
+
(
−
1
)
n
α
B
θ
=
n
π
±
α
\theta=n\pi\pm\alpha
θ
=
nπ
±
α
C
θ
=
2
n
π
+
α
\theta=2n\pi+\alpha
θ
=
2
nπ
+
α
D
cos
θ
=
cos
α
:
θ
=
2
n
π
±
α
;
\cos\theta=\cos\alpha:\ \theta=2n\pi\pm\alpha;
cos
θ
=
cos
α
:
θ
=
2
nπ
±
α
;
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