Question

if 270°<A<360° and cosA=5/13,the value of 13sinA+5tanA/12cotA-5secA is​

Answer 1

Answer:

opt D

Step-by-step explanation:

take a right angle triangle

as theta is in fourth quadrant

all trigonometric values except cos and secant are neg

from that triangle we have

sin A=-12/13

tanA=-12/5

cot A=-5/12

sec A=13/5

by substituting all these values we get answer

Answer 2

Step-by-step explanation:

cosA=5\13

then,

sinA=√{1-(5\13)^2}

=√(1-25\169)

=√{(169-25)\169}

=√(144\169)

=12\13

tanA=sinA\cosA

=(12\13)\(5\13)

=12\5

cotA=5\12

secA=13\5