Questions asked by HAL 9000
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How do you solve #6cos^2(x)+7cos(x)+2=0# in the interval [0,360) ??

What are the solutions for #sec^2x+6tanx=6# in the interval [0,2pi) ??

How can I know that the inverses of trig functions are actually not functions at all?

Find solutions in decimal form rounding to the nearest thousandth for #sec^2x+4tanx=2# in the interval [0,2pi) ?

Use doubleangle or halfangle formula to simplify #(2csc^2(x))/(csc^2(x))# ?

Use a producttosum identity to rewrite the expression cos 40° cos 20° ?

How to prove this identity?

A pole leans away from the sun at an angle of 9° to the vertical. When the elevation of the sun is 49°, the pole casts a shadow 43 ft long on level ground. How long is the pole?

Solving this triangle using appropriate Law of Sine?

I need help with vectors?

Magnitude and vectors?

Which Law of Sines applies to this?

How far did the skater skate from point A to B?

Calculation of vector?

Magnitude and angle made with larger force?

Finding slope of line containing two points?

Write an equation in standard form that has a slope of 0 and goes through the
point (5,2) ?

Solving equation?

Graph the function? Thank you

Factor and simplify please?

Simplify please?

Prove the identity?

Solving this triangle?

Solving this triangle?

2x^2=4x1 using quadratic formula?

An airplane travels at 125 km/hr...?

Given the central angle of the wedge on a pie graph, how do I find the percentage?

Suppose that IQ scores have a bellshaped distribution with a mean of 104 and a standard deviation of 15. Using the empirical rule, what percentage of IQ scores are at least 59? Please do not round your answer.

Central limit theorem?

Two cards are drawn without replacement from a standard deck of 52 playing cards. What is the probability of choosing a jack and then, without replacement, another jack?

Two cards are drawn without replacement from a standard deck of 52 playing cards. What is the probability of choosing a queen for the second card drawn, if the first card, drawn without replacement, was a king?

Combinations and permutations?

In 2004, China spent $57.5 billion on defense, representing 4% of the world's total military spending. Now it spends far more. How might China's rapid increase in military spending impact its relations with the United States?