Math, asked by vaishnavivasanthi04, 11 months ago

cos 90 degree=1-2 sin square45 degree = 2 cos square45 degree-1 verify

Answers

Answered by maheshdudi21

0

Step-by-step explanation:

cos 90 =0

1-2sin245=1-2×1/2

=1-1=0

2cos2 45-1=2×1/2-1

=0

LHS =RHS

hence proved

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