Introduction to Trigonometry
If (axsinθ−bycosθ)=1 and (axcosθ+bysinθ)=1. Prove that a2x2+b2y2=2
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Evaluate the following :cot80tan10
Consider △ACB, right-angled at C, in which AB=29 units, BC=21 units and ∠ABC=θ. Determine the values of cos2θ+sin2θ.
Prove that cos20∘sin70∘+sec70∘cosec20∘−2cos70∘cosec20∘ =0
Prove the following identity, where the angle involved is acute angle for which the expression are defined.cosA+sinA−1cosA−sinA+1=cscA+cotA, Using the identity csc2A=1+cot2A.
The value of tanθ⋅tan(90−θ) is equal to
If x=asecθ+btanθ and y=atanθ+bsecθ, prove that (x2−y2)=(a2−b2).