I hope this helps you
-cos²x= sin²x-1
4.sinx = sin²x-1+4
sin²x-4.sinx +3=0
(sinx-3)(sinx-1)=0
sinx≠3
sinx =1
SİN90=1
Answer:
Option A. 4+5i
Step-by-step explanation:
we know that
The form of (a + bi) is known as a complex number where a and b are real numbers and i is an imaginary number equivalent to the square root of negative 1
we have the number

Remember

substitute

Answer:
The answer is -64.
explanation:
(6 8/25)÷(-1)-(-0.8)×(-0.1))
=-6.4
(-0.25÷1.25)-1 3/5÷(-5 1/3)
=0.1
-6.4÷0.1
= -64