Question

1- cot⁴x = 2 csc²x-csc⁴x​

Answer 1

Respuesta:

→ cosec⁴x - cot⁴x = cosec²x + cot²x

in LHS ,, using (a⁴ - b⁴) = (a² - b²)(a²+b²)

→ (cosec²x - cot²x)(cosec²x + cot²x)

Now, we know that, (cosec²x - cot²x) = 1 ,,

So,

→ 1 * (cosec²x + cot²x)

→ (cosec²x + cot²x) = RHS . (Proved).

Explicación paso a paso: