NCERT Class XI Mathematics - Trigonometric Functions - Solutions
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Question : 11
Total: 61
sec x =
, x lies in fourth quadrant.
Solution:
sec x =
gives cos x =
t a n 2 x = s e c 2 x - 1 ⇒ t a n 2 x =
- 1 =
⇒ tan x = ±
⇒ tan x =
⇒ cot x = −
[since x lies in fourth quadrant]
sin x = tan x × cos x
⇒ sin x =
×
=
⇒ cosec x =
⇒ tan x =
sin x = tan x × cos x
⇒ sin x =
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