1.

If tan ×=3/4×lies in third quadrant then find cos ×​

Answer»

ANSWER:

cosX=-4/5

Step-by-step EXPLANATION:

tanx=3/4

tanx=opp/adj

h^2=s^2+s^2

h^2=3^2+4^2

h=5

cosX=adj/hyp

cosX=4/5

X lies in THIRD QUADRANT.so,in thrid quadrant tan and cot are positive.

so,cosx=-4/5


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