Answer:
Yes.
Step-by-step explanation:
Answer:
6 and 3/5
Step-by-step explanation:
Answer: C
Step-by-step explanation: l-7&!:
Answer:
No
Step-by-step explanation:
No, because x + x^2 cannot be grouped together.
<u>Answer and explanation</u>
(1+sinθ)(1-sinθ)=cos²θ
We are to prove that the left hand side is equal to the right hand side.
(1+sinθ)(1-sinθ) = 1(1-sinθ) + sinθ(1-sinθ)
= 1 - sinθ + sinθ - sin²θ
= 1 - sin²θ
From the trigonometric identity sin²θ + cos²θ = 1,
1 - sin²θ = cos²θ