Byju's Answer
Standard X
Mathematics
Range of Trigonometric Ratios from 0 to 90 Degrees
Choose all wh...
Question
Choose all whose value is equal to zero.
A
C
o
s
0
∘
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B
C
o
s
90
∘
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C
S
i
n
0
∘
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D
S
i
n
90
∘
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E
T
a
n
0
∘
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F
T
a
n
90
∘
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G
C
o
t
0
∘
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H
C
o
t
90
∘
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I
1cot 0∘
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Q.
Prove the following :
(i) sin θ sin (90° − θ) − cos θ cos (90° − θ) = 0
(ii)
cos
90
°
-
θ
sec
90
°
-
θ
tan
θ
cosec
90
°
-
θ
sin
90
°
-
θ
cot
90
°
-
θ
+
tan
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°
-
θ
cot
θ
=
2
(iii)
tan
90
°
-
A
cot
A
cosec
2
A
-
cos
2
A
=
0
(iv)
cos
90
°
-
A
sin
90
°
-
A
tan
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-
A
=
sin
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A
(v) sin (50° − θ) − cos (40° − θ) + tan 1° tan 10° tan 20° tan 70° tan 80° tan 89° = 1