Question
If cos2θ -sin2θ=1/3, value of (cos4θ-sin4θ+1) is:
(A) 4/3
(B) 5/3
Read 12 Solution.
option A
ASHOK M BHARTI 11 year ago
is this solution helpfull: 1 1
given that
cos2 θ-sin2 θ=1/3
cos2 θ=1/3-sin2 θ
sqaring boththe side
cos4 θ= 1/9+sin4 θ-2/3sin2 θ
VIPUL PANDEY 11 year ago
is this solution helpfull: 1 1
cos2θ -sin2θ=1/3..........<i>
=
cos4θ-sin4θ+1
can be written as
<cos2θ -sin2θ><cos2θ+sin2θ>+1
=<1/3> <1> +1...........<from i.
=4/3
RATTAN SINGH 11 year ago
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7/3
MANISHAGAJWANI 11 year ago
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NISCHAL ACHARYA 11 year ago
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NISCHAL ACHARYA 11 year ago
is this solution helpfull: 0 1
NISCHAL ACHARYA 11 year ago
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NISCHAL ACHARYA 11 year ago
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AARSHI 10 year ago
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Option A) 4/3
AARSHI 10 year ago
is this solution helpfull: 1 0
Option A) 4/3
AARSHI 10 year ago
is this solution helpfull: 1 0
Option A) 4/3
AARSHI 10 year ago
is this solution helpfull: 1 0