plz....................
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sin Q + sin2Q = 1
---> sin Q = 1 - sin2Q
---> sin Q = cos2Q [as, 1 - sin2Q = cos2Q] .... (I)
So,
cos2Q + cos4Q
= cos2Q + (cos2Q)2 [as, cos4Q = (cos2Q)2]
= sin Q + (sin Q)2 [from (I)]
= sin Q + sin2Q
= 1 .... (ans) ....
Hope this helps !!
---> sin Q = 1 - sin2Q
---> sin Q = cos2Q [as, 1 - sin2Q = cos2Q] .... (I)
So,
cos2Q + cos4Q
= cos2Q + (cos2Q)2 [as, cos4Q = (cos2Q)2]
= sin Q + (sin Q)2 [from (I)]
= sin Q + sin2Q
= 1 .... (ans) ....
Hope this helps !!
Shailesh183816:
Khana kha liya??
Tum toh Aise pooch rhe ho jaise main tumhari gf hu
Kyu gf se aise hi bat karte hai kya sab ?????
maybe
Gf ka to pta nhi lekin
Mai apne frds se aise hi bat karta hu
OK
Ok
bye.....
Bye
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