For any angle θ, state the value of :
sin2 θ + cos2 θ.
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If sin x = cos y, then x + y = 45°; write true or false.
sec θ. cot θ = cosec θ write true or false.
State for any acute angle θ whether :
sin θ increases or decreases as θ increases.
cos θ increases or decreases as θ increases.