Question

cos^4A -cos^2A=sin^4A- sin^2A
please tell fast it urgent​

Answer 1

cos^4A- cos^2A = sin^4A -sin^2A

take cos^2Acommon

cos^2A( cos^2A-1) = sin^2A( sin^2A-1)

using id= sin^2A+cos^2A=1

cos^2A(1-sin^2-1) = sin^2A(1-cos^2A-1)

in the bracket cancel out the +1 and -1

cos^2A *-sin^2A= sin^2A*-cos^2A

-sin^2Acos^2A= -sin^2Acos^2A

cancel out lhs and rhs hence your ans is 1

Answer 2

Answer:

Your Question :

Find the value of 30% of 50 .

Required AnsweR :

\begin{gathered}\\ \longrightarrow\sf{ \dfrac{30}{100}\times 50}\end{gathered}

⟶

100

30

×50

\begin{gathered}\\ \longrightarrow\sf{ \dfrac{1500}{100}}\end{gathered}

⟶

100

1500

\begin{gathered}\\ \longrightarrow\sf{ 15}\end{gathered}

⟶15

30% of 50 is 15 .

hope it helps you .