If cos 27° = \(x\); then the value of tan 63° is?
Answer & explanation
Correct answer: option 1
cos27° = x = sin63° [because cos ∝ = sin (90-∝)]
⇒ cos63° = \(\sqrt {1-sin^2 63 }\) {Cos ∝ = \(\sqrt{1 - sin^2 ∝}\)}
⇒ cos63° = \(\sqrt {1-x^2 }\)
∴ tan63° = \(\frac{sin63°}{cos63°}\) = \(\frac{x}{\sqrt {1-x^2}}\)