Math, asked by kethavathsrinusrinu, 10 months ago

form where q = 0 and p, q are integers
р
Express each of the following decimals in
q
1) 0.36
ii) 15.4 iii) 10.25
iv) 3.25
р
C1
11​

Answers

Answered by XxheartlessXx35
4

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cosA=5/13

sinA=-√(1-cos^2A) (since theta is in 4th quadrant)

i.e. sinA=-√144/169

=-12/13

tanB=-15/8

sinB=+(15)/√{(-15)^2+(8)^2} (B is in Q2)

i.e. sinB=15/17

cosB=tanB/sinB

i.e. cosB=-15/8 * 17/15

cosB=17/8

now

sin(A+B)=sinAcosB+cosAsinB

sin(A+B)=(-12/13)(17/8)+(5/13)(15/17)

={1/13}(-51/2 + 75/17)

=(1/13)(-710/34)

=-710/442

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