Question

please help
Rewrite 1−cos135 sin135 using a half-angle identity.

Answer 1

Rewrite 1−cos135/sin135 using a half-angle identity.

Answer 2

Do you know any formulas for half angles?

Answer 3

BTW, your original question is different from the second

Answer 4

cos^2 X= 1/2(1+cos(2X))
sin^2 x= 1/2(1-cos(2X))

Answer 5

yeah it's the second one

Answer 6

tan^2 X= 1-cos(2X)/1+cos(2X)

Answer 7

This problem seems a bit far-fetched to me, because the exact values of this particular sin and cos are easily found.

You might know them: \(\cos 135°=-\frac{1}{2}\sqrt{2}\), \(\sin 135°=\frac{1}{2}\sqrt{2}\),

So the answer is 1 - - 1 = 2.

I cannot see how half-angle formulas would be of help here...

Answer 8

because it has to be re written

Answer 9

thank you anyways

Answer 10

OK, I will give it a try...(might take a few minutes)

Answer 11

its ok no need to

Answer 12

Sigh! (of relief)

Answer 13

lol thank you :)