Question

trigonometry question

Answer 1

= \[\frac{ 4xy }{(x+y)^{2}}=\sec ^{2}(\theta)\] is true if only if

Answer 2

a) x+y not equal to zero
b)x=y, x is not equal to zero
c)x=y
d)x is not equal to zero and y is not equal to zero

Answer 3

what was your approach?

Answer 4

@Miracrown @hartnn @ganeshie8 @wio @Michele_Laino

Answer 5

option a is not valid cause one number may be zero

Answer 6

what can`t be in domain of the above problem

Answer 7

@kanwal32 did you tried the option B ?

Answer 8

90 degree and its multiple

Answer 9

\[\sec^2\theta \ge 1\] use this to find the relation between x and y

Answer 10

yes i think so b option is right cause it will give us root 2 which is there