Answers

2016-03-03T11:31:05+05:30
Cot^2ɵ = cosɵ x cosɵ           sin^2ɵ   =  sinɵ x sinɵ
                ------------------       
                  sin
ɵ x sinɵ

cot^2
ɵ =  1/sin^2ɵ
cosɵxcosɵ           1
________   =  _____
sin
ɵ x sinɵ        sinɵ xsinɵ

cos^2
ɵ = 1
cosɵ = +1 , -1
ɵ = 0, 180 degree
ɵ = 180degree (π)
                
               
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