last step how come 2upon cos^2 theta =2sec^2
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Because 1/cos^2theta=sec^2theta
Answered by
1
2/ cos^2theta
=2/1/sec^2theta
(cos^2theta = 1/sec^2theta)
hence , 2sec^2theta
=2/1/sec^2theta
(cos^2theta = 1/sec^2theta)
hence , 2sec^2theta
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