Question

What is the value of 7sin2θ+7cos2θ

a) 1 b) 14 c) 7 d)-7​

Answer 1

Answer:

7sin²θ + 2cos²θ = 4

7sin²θ + 2(1-sin²θ) = 4

7sin²θ+2-2sin²θ = 4

5sin²θ+2 = 4

7sin²θ=1

sin²θ = -7

sinθ = +7

sinθ = 7

Therefore tan θ = 7

then we get tan θ = + 7

Step-by-step explanation: