tan(135) = -tan(180-135) = -tan(45) = -1
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If tan 3a is equal to sin cos 45 plus sin 30, then the value of a = 0.4.
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)
To find the value of z, set up the equation: 9z = 135 (then divide both sides of the equation by 9) z = 15
tan (pi) / 1 is zero. tan (pi / 1) is zero.
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