Trigonometric EquationHard
Question
If sin-1
+ cosec-1 
= 
then a value of x is
+ cosec-1 = then a value of x isOptions
A.1
B.3
C.4
D.5
Solution
sin-1
⇒ sin-1
= cos-1
⇒ sin-1 = sin-1
∴ x = 3.
⇒ sin-1
= cos-1 ⇒ sin-1 = sin-1 ∴ x = 3.
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