Is cot equal to cos by sin?
Determine if cot equal to cos by sin
For any angle θ in a right-angled triangle,
tanθ=sinθcosθ
Now, we know that cotangent is the reciprocal of tangent, therefore,
cotθ=1tanθ⇒cotθ=cosθsinθ
Hence, we can say that cot equal to cos by sin.
Evaluate :cos48°-sin42°