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(1+sec20^(@)+cot70^(@))(1-"co s ec"20^(@...

`(1+sec20^(@)+cot70^(@))(1-"co s ec"20^(@)+tan70^(@))` किसके बराबर होगा ?

A

`-1`

B

2

C

1

D

`-2`

Text Solution

Verified by Experts

The correct Answer is:
D
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The value of (1+sec20^(@)+cot70^(@))(1-"cosec"20^(@)+tan70^(@)) is equal to

tan 70^(@) - tan 20^(@) -2 tan 40^(@)=

sec70^(@)sin20^(@)+cos20^(@)"cosec"70^(@)=?

cot70^(@)+4cos70^(@)

Q.sqrt(3)cos ec20^(@)-sec20^(@)=

cot10^(@)cot20^(@)cot60^(@)cot70^(@)cot80^(@)=

The value of (1 + sec 20^@ + cot 70^@ ) ( 1- cosec 20^@ + tan 70^@) is :

The value of (tan 70^(@) - tan 20^(@))/( tan 50^(@))=

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