1.

If tanA =1 ,then secA =?​

Answer»

ANSWER:

Correct option is

C

cosA

We NEED to FIND VALUE of (secA+TANA)(1−sinA)

Putting the values of secA and tanA as

secA=

cosA

1

tanA=

cosA

sinA

(

cosA

1

+

cosA

sinA

)(1−sinA)

=

cosA

1+sinA

(1−sinA)

,=

cosA

1−sin

2 A= cosA

cos

2 A .... (As 1−sin

2 A=cos

2 A)=cosA



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