Tuesday

March 31, 2015

March 31, 2015

Posted by **PLEASE HELP!!!** on Thursday, November 12, 2009 at 7:52pm.

- trig -
**Reiny**, Thursday, November 12, 2009 at 9:26pmdivide each term by cosA

sinA = 1 - cos^2A/sinA

multiply each term by sinA

sin^2A = sinA - cos^2A

sin^2A = sinA - (1 - sin^2A)

1 = sinA

A = 90º or pi/2 radians

or in general:

A = k(90)º or k(pi/2) radians

- trig -
**drwls**, Thursday, November 12, 2009 at 10:48pmA = pi/2 + 2 n pi radians. n is any integer, including zero

**Answer this Question**

**Related Questions**

math (trig) - i have some problems doing trig the first one is: Show that cos(x/...

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) ...

trig - I need to prove equality. a) (sina + cosa)^2 -1 / ctga - sinacosa = 2tg^...

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

trig - How to do this one? (sina/1-cosa) + (1-cosa/sina) = Also, wanted to ask ...

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

math - 1. (sec^2x-6tanx+7/sec^2x-5)=(tanx-4/tanx+2) 2. (sin^3A+cos^3A/sinA+cosA...

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