Introduction to Trigonometry
For an acute angle θ in a right angled triangle, tanθ=
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Evaluate the following :cos213∘−sin277∘
From the given figure, find the value of :cosθ
Prove that following identities, where the angles involved are acute angles for which the trigonometric ratios as defined: (secA−1)/(secA+1)=(1−cosA)/(1+cosA).
The value of tan45o×cot45o is :
cos24∘5 sin66∘−tan5∘2 cot85∘
Evaluate the following :cos54∘sin36∘−cos36∘sin54∘
The value of tan260o is:
If tanA=43 and A+B=90∘, then what is the value of cotB?