Evaluateda.CostxtSinu

1.	Evaluateda.CostxtSinu
Answer» (1/√2) tan^-1((tan^2x -1)/(√2tanx)) +c Sine, Cosine and Tangent Sine,CosineandTangent(often shortened tosin,cosandtan) are each aratio of sidesof a right angled triangle: For a given angleθeach ratio stays the sameno matter how big or small the triangle is To calculate them: Divide the length of one side by another side Example: What is the sine of 35°? Usingthistriangle(lengthsare only to one decimal place): sin(35°)=OppositeHypotenuse=2.84.9=0.57...cos(35°)=AdjacentHypotenuse=4.04.9=0.82...tan(35°)=OppositeAdjacent=2.84.0=0.70...

Answer»

(1/√2) tan^-1((tan^2x -1)/(√2tanx)) +c

Sine, Cosine and Tangent

Sine,CosineandTangent(often shortened tosin,cosandtan) are each aratio of sidesof a right angled triangle:

For a given angleθeach ratio stays the sameno matter how big or small the triangle is

To calculate them:

Divide the length of one side by another side

Example: What is the sine of 35°?

Usingthistriangle(lengthsare only to one decimal place):

sin(35°)=OppositeHypotenuse=2.84.9=0.57...cos(35°)=AdjacentHypotenuse=4.04.9=0.82...tan(35°)=OppositeAdjacent=2.84.0=0.70...

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