cos^4A -cos^2A=sin^4A- sin^2A
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Answered by
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
Answered by
1
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 .
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