We know that sin2x=2sinxcosx
(search the net for proof if you wish)
So the original equation becomes
2sinxcosx-sinx=0
The two terms both have sinx that can be taken out to get:
sinx(2cosx-1)=0
This is true if sinx=0 or 2cosx-1=0 , rewritten: cosx=1/2
sinx=0 than x=2kπ
cosx=1/2 than x=π/3+2kπ
where k is an integer
Answer:
-7500
Step-by-step explanation:
Given: −2(25)10x
We need to find the value of the given expression at x = 15
So,
−2(25)10x = −2(25)10 * 15
Using the associative property
= (-2 * 25) * (10 * 15)
= -50 * 150
= -7500
Answer:
-68ft, or 68ft below sea level
Step-by-step explanation:
-72+4=-68
Answer:
The answer is 309.
Step-by-step explanation:
This is found when you solve for x in this equation:
(1883+x)/8=274
Answer:
9
Step-by-step explanation:
- 36 = 5x
- 36 = 5x
-5x = 36
- 45 = 36
+ 45 + 45
-----------------------
81 = 81 ✅
- 36 = 5(9)
81 - 36 = 45 ✅
