1
cota (90°-0)
112. Prove that
tan20-1
112 The nolueofc2260
cosec29
+
sec20-cosec20
ton2760
sin28-cos20
Answers
Answered by
2
Answer:
I think so your question is wrong....
Answered by
1
Step-by-step explanation:
Given expression is
sin20
∘
3
−
cos20
∘
1
=2(
sin20
∘
3
/2
−
cos20
∘
1/2
)
=2(
sin20
∘
sin60
∘
−
cos20
∘
cos60
∘
)
=2(
sin20
∘
cos20
∘
sin60
∘
cos20
∘
−cos60
∘
sin20
∘
)
=2(
sin20
∘
cos20
∘
sin(60
∘
−20
∘
)
)
=2
sin20
∘
cos20
∘
sin40
∘
=2×
sin20
∘
cos20
∘
2sin20
∘
cos20
∘
=4
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