# Prove that #2cot(x/2) (1-cos^2(x/2))#is identical to #sinx# ?

See below.

We will use the following identities:

Start of proof

By signing up, you agree to our Terms of Service and Privacy Policy

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- Prove that #((cos(33^@))^2-(cos(57^@))^2)/((sin(10.5^@))^2-(sin(34.5^@))^2)= -sqrt2# ?
- How do you simplify the expression #sint/(1-cost)+(1-cost)/sint#?
- How do you solve #arctan(2x-3)=pi/4#?
- How do you solve this trigonometric equation?
- How can you verify #sinx/(sinx+cosx)=(cotx-1)/(cotx+1)# by only manipulating the left side?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7