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JEE Advanced (True/False): Trigonometric Functions & Equations

Q.1. If  tan A = (1- cos B)/sinB , then tan 2A = tan B. (1983 - 1 Mark)

Ans. T

Sol.  JEE Advanced (True/False): Trigonometric Functions & EquationsJEE Advanced (True/False): Trigonometric Functions & Equations

Hence   JEE Advanced (True/False): Trigonometric Functions & EquationsJEE Advanced (True/False): Trigonometric Functions & Equations

∴ Statement is true.

 

Q.2. There exists a value of  θ between 0 and 2π that satisfies the equation sin4θ - 2 sin2θ - 1 = 0 .   (1984 - 1 Mark)

Ans. F

Sol.  Given equation is sin4θ- 2 sin2θ - 1=0 Here,    

D = 4 + 4 = 8

JEE Advanced (True/False): Trigonometric Functions & Equations

But sin2θ can not be -veJEE Advanced (True/False): Trigonometric Functions & Equations

But asJEE Advanced (True/False): Trigonometric Functions & Equations  JEE Advanced (True/False): Trigonometric Functions & Equations

Thus there is no value of θ which satisfy the given equation.

∴ Statement is false.

The document JEE Advanced (True/False): Trigonometric Functions & Equations is a part of the JEE Course Chapter-wise Tests for JEE Main & Advanced.
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