find the value of. (1). 2 cos²Φ +2/1+cot²Φ. (2) 5/cot²Φ-- 5/cot²Φ
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(1). 2cos^2a+(2/1+cot^2a)
= 2cos^2a +2sin^2a
=2(1)=2
(2). 5/cot^2a -5 /cos^2a
=5tan^2a-5/cos^2a
5/cos^2a{sin^2a-1}
=5/cos^2a(-cos^2a)
= -5.........ans
= 2cos^2a +2sin^2a
=2(1)=2
(2). 5/cot^2a -5 /cos^2a
=5tan^2a-5/cos^2a
5/cos^2a{sin^2a-1}
=5/cos^2a(-cos^2a)
= -5.........ans
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