ifsin theta + cos2 theta = 1 , then find the value of cos2 theta + cos4 theta only verified answers tumese kisi Ke bas ki baat nhi hai
Answers
Answered by
9
Step-by-step explanation:
Given, sinθ+sin
2
θ=1
⇒sinθ=1−sin
2
θ=cos
2
θ
Therefore, cos
2
θ+cos
4
θ=cos
2
θ(1+cos
2
θ)
=sinθ(1+sinθ)
=sinθ+sin
2
θ
=1
jaikumarkk216:
bhai question to dekh lo bas tepe ja rahe ho
Answered by
1
Answer:
Given, sinθ+sin²θ=1
⇒sinθ=1−sin²θ=cos²θ
Therefore, cos²θ+cos⁴θ=cos²θ(1+cos²θ)
=sinθ(1+sinθ)
=sinθ+sin²θ=1
Similar questions