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Q: What is the value of tan 30?

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tan (30 degrees) would be equal to 0.577350269.

cot(15)=1/tan(15) Let us find tan(15) tan(15)=tan(45-30) tan(a-b) = (tan(a)-tan(b))/(1+tan(a)tan(b)) tan(45-30)= (tan(45)-tan(30))/(1+tan(45)tan(30)) substitute tan(45)=1 and tan(30)=1/√3 into the equation. tan(45-30) = (1- 1/√3) / (1+1/√3) =(√3-1)/(√3+1) The exact value of cot(15) is the reciprocal of the above which is: (√3+1) /(√3-1)

If tan 3a is equal to sin cos 45 plus sin 30, then the value of a = 0.4.

tan(30)=.5773502692

tan(135) = -tan(180-135) = -tan(45) = -1

The value of tan A is not clear from the question.However, sin A = sqrt[tan^2 A /(tan^2 A + 1)]

30°

tan 13/30

tan(22.5)=0.414213562

Tan 42 degrees = 0.9004

tan(61Â°) = 1.80405 (rounded)

= tan (48.323 deg) = 1.1232

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