<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
Answer:
Step-by-step explanation:
a³-b³=(a-b)(a²+ab+b²)
6³-1=6³-1³=(6-1)(6²+6*1+1²)=5×43
so 6³-1 is divisible by 5.
Answer:
he is fifty years old
Step-by-step explanation:
six years ago he would have been 44 yearsold
Answer:
Step-by-step explanation:
100%
