Q. 155.0( 1 Vote )
Mark the correct A. 3/4
B. 1/2
C. 2
D. 5/4
Answer :
Given x is an acute angle and value of tan x =1/√7.
⇒ We know tan2x + 1 = sec2x
⇒ Also, cot2x+1 = cosec2x
⇒ cot2 x=7
⇒ cot2x+1 = 7+1
=8
⇒ cosec2x = 8
∴
⇒
⇒
⇒
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