At θ=90∘, which of the two angles are not defined?
cot θ,sin θ
tan θ,cosec θ
cot θ,tan θ
tan θ,sec θ
As tan θ=sin θcos θ and at θ=90∘,cos 90∘=0. So, tan θ is not defined. Similarly, sec θ=1cos θ. So, sec θ is not defined at θ=90∘.
At θ=90∘ which of the two trigonometric ratios are not defined?
Two bodies are thrown with the same initial velocity at angles θ and (90∘−θ) respectively with the horizontal, then their maximum heights are inthe ratio: