Tuesday

March 3, 2015

March 3, 2015

Posted by **Abby** on Wednesday, March 23, 2011 at 5:52pm.

- Math -
**Anonymous**, Wednesday, March 23, 2011 at 6:05pmtan(x)=sin(x)/cos(x)

sin(x)/cos(x)=5sin(x) Divide withsin(x)

1/cos(x)=5

1=5*cos(x) Divide with 5

cos(x)=1/5

cos(x)=0.2

OR

1/cos(x)=5

sec(x)=5

- Math -
**Meg**, Wednesday, March 23, 2011 at 9:16pmThe only choices were A) 0, 1.571 B) -1.571, 0, 1.571 C) -1.369, 0, 1.369 D) 0, 1.369

- Math -
**Anonymous**, Thursday, March 24, 2011 at 5:44amtan(0)=0

sin(0)=0

tan(0)=5*sin(0)

0=0

arccos(0.2)=1.3694384 radians

tan(-alpha)= -tan(alpha)

sin(-alpha)= -sin(alpha)

tan(-1.3694384)=5 sin(-1.3694384)

Answer C) C) -1.369,0,1.369 is correct

**Answer this Question**

**Related Questions**

Math - Evaluate *Note - We have to find the exact value of these. That I know to...

Math, please help - Which of the following are trigonometric identities? (Can be...

Math integrals - What is the indefinite integral of ∫ [sin (π/x)]/ x^...

Precalculus - Use one of the identities cos(t + 2πk) = cos t or sin(t + 2&#...

Precalc/Trig - Sorry there are quite a few problems, but I just need to know if ...

Math - Write an equation of the tangent function with period (3π)/8, phase ...

Calculus - How do I find the critical values? y= 4/x + tan(πx/8) What I ...

Trig Help! - Question: Trying to find cos π/12, if cos π/6 = square ...

Trigonometry - IM STUCK ON THESE :( 1. What is the equation for shifting the ...

Trigonometry - IM STUCK ON THESE :( 1. What is the equation for shifting the ...