Accenture Company Numerical Ability Trigonometry

If cot A + cosec A = and A is an acute angle, then the value of cos A is
A) 4/5 B) 1/2 C) 1/√3 D) 1

Read Solution (Total 2)

the answer is A
4 years agoHelpfull: Yes(0) No(0)

Cosec²A-cot²A =1
Cosece A + cot A = 3 (given)....…........1

(CosecA+cotA) ( cosecA-cotA) = 1

3(cosecA-cotA)= 1

CosecA-cotA = 1/3..….........….........2
Solving 1 &2
We get
SinA= 3/5
And we get cosA = 4/5
3 years agoHelpfull: Yes(0) No(0)

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