Question

If 7 sin2

θ + 3 cos2

θ = 4, then θ = ?​

Answer 1

Answer:

4 ok thanks and

Answer 2

Dividing both sides of the equation by cos

2

θ we have:

7tan

2

θ+3=4sec

2

θ=4(1+tan

2

θ)

7tan

2

θ+3=4+4tan

2

θ

⇒3tan

2

θ=1

tanθ=±

3

​

1

​