Answer:
83746+4747+48484=3943848343
Step-by-step explanation:
Easy
22224446668880÷107=207705109054.19
Answer:
b^5
Exponent rule when dividing = subtract exponents
b^12 - b^7 = b^5
Step-by-step explanation:
Answer:
-90 , 30
Step-by-step explanation:
sina = cos(2a)
= 1 - 2(sina)^2
2(sina)^2 + sina -- 1 = 0
( sina + 1 )( 2sina - 1 ) = 0
sina = -1 or sina = 1/2
=> a = -90 degrees or => a = 30 degrees
