Friday

October 24, 2014

October 24, 2014

Posted by **Kavya** on Sunday, June 8, 2014 at 11:01pm.

- Maths, Divine International Public School -
**Reiny**, Sunday, June 8, 2014 at 11:45pmcotA = 8/15

tanA = 15/8

so y=15, x=8

r^2 = 15^2 + 8^2

r = √289 = 17

sinA = 15/17

cosA = 8/17

then (1+SinA)(1-SinA)/(1+CosA)(1-CosA)

= (1 - sin^2 A)/(1 - cos^2 A)

= (1 - 225/289)/(1 - 64/289)

= (64/289) / (225/289)

= 64/225

**Answer this Question**

**Related Questions**

Maths - Hi, can someone give me the answer to this question: secA-tanA=1/4. Find...

further mathematics - Let P=(cosA sinA) (sinA cosA) Q=(cosB sinA) (sinB cosA) ...

maths(trigonometry) - prove that sinA-cosA+1/sinA+cosA-1=1/secA-tanA

trig - Please help me how to do this: 1) 1 + sina*cosa / (cosa + sina)^2 = 2) ...

trig - Establish the following identity: CosA/1-TanA + SinA/1-CotA = CosA-SinA

trig - I need to count this: a) 1-tg^2a/1+ctg^2a, when sina =2/3 b) 1-tg^2a/1-...

trig - Prove : (sinA-cosA+1)/(sinA+cosA-1) = (1+sinA)/cosA

trig - prove that :cosA-sinA+1/cosA+sinA-1=cosecA+cotA

Math - CosA/1+sinA=1-sinA/cosA I have to prove the identity each side has to b ...

Math - prove that sinA/(1+cosA) + (1+cosA)/(sinA) = 2cosecA