MaxWong

I now have time to do some of the remaining questions :D good news.

3)$\frac{siny+tany+cosy}{tany}=siny\times coty+1+cosy\times coty=cosy+cosy\times secy+cosy\times coty=cosy(1+secy+coty)$

4)$cscUsecU-cotU=\frac{1}{sinUcosU}-\frac{1}{tanU}=\frac{tanU-sinUcosU}{sinUcosUtanU}=\frac{sinU(1-cos^2U)}{sin^2UcosU}=\frac{sin^3U}{sin^2UcosU}=\frac{sinU}{cosU}=tanU$

5)$\frac{tanA+1}{sec^4A}=\frac{\frac{sinA+cosA}{cosA}}{\frac{1}{cos^4A}}=cos^3AsinA+cos^4A=cos^3A(sinA+cosA)$

Welcome back then 

Whoever set this question must have gone nuts. XD

Anyways

2,974,807+3,907,738+1,119,583+729,498+512,930+37,360+908,007+26,745+135,294+978,933+28,674

= 11,359,569

10^30

=10000000000000000000000000000000

where there is 30 zeros

sorry for the bad grammar because i come from china

90+0.05y=83.5

0.05y=83.5-90=-6.5

y = -130

$5cosx-2=2$

$5cosx=4$

$cosx=0.8$

$x=acos0.8$

which is 36.869897.......° or 0.643501108...... radians

Do you actually mean: $\frac{1}{3}\times\pi\times9\times4?$

This will equal 12π

You just write it like a normal equation, but you replace the = with >, <, ≤, or ≥.

http://www.piday.org/million/

1 million digits of pi

I will do the second one may be?

$sinA(1+cot^2A) = sinA+\frac{sinA}{tan^2A}=sinA+\frac{sinAcos^2A}{sin^2A}=\frac{sin^2A}{sinA}+\frac{cos^2A}{sinA}=\frac{1}{sinA}=cscA$