RRB Group D Model Paper 10 with solutions

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Question : 59 of 100

Marks: +1, -0

If

sin^4θ + cos^4θ

= 2

sin^2θ cos^2θ

(θ is an acute angle), then the value of tan θ is

1
2
$√2$
0

Solution:

(1)

sin^4θ + cos^4θ

- 2

sin^2θ cos^2θ

= 0

(sin^2θ - cos^2θ)^2

= 0
⇒

sin^2θ = cos^2θ

tan^2θ

= 1 ⇒ tanθ = 1

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