Question

prove:-
${ cos }^{4} a + { \sin }^{4} a + 2 { \cos }^{2} a \sin^{2} a \ = 1$
please help me !​

Answer 1

Step-by-step explanation:

$\huge\fbox\red{A}\fbox\pink{n}\fbox\purple{S}\fbox\green{w}\fbox\blue{E}\fbox\orange{r}$

${ ({cosa}^{2} + { sina }^{2} )}^{2}$

$( {1})^{2}$

$1$

$HEARTLESS BoY♡$

Answer 2

Step-by-step explanation:

(1³+2³+3³+4⁴+5³),^½ = (1³+2³+3³+4³)^½+(5³)^⅓

=> (1+8+27+64+125)^½ = (1+8+27+64)^½+(125)^⅓

=> √225 = √100 +³√125

=> 15 = 10+5

=> 15 = 15

Hence, LHS = RHS

(proved)