Question

Pre-Cal Problem. Please Help. True or False question.

Answer 1

for all values of a. true or false.

Answer 2

one would use the identity, cos 2x = 1-2sin^2x and think its true, BUT
for negative values if 'a', the above equation will not get satisfied...

Answer 3

so thus meaning the answer will therefore be false ? :)

Answer 4

yup :)

Answer 5

Thanks!!

Answer 6

welcome :)

Answer 7

The picture shows the `Sine Half-Angle Formula`.
I don't see any mistakes in it. it should be true. :o

Answer 8

^ yes it should be for most values of "a"; positive values.
But its false for some values of "a"; negative values.

And it asks: for all values of a. true or false.