Introduction to calculus

Welcome to the Introduction to Calculus

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Express $\tan(\theta) \,\$ in terms of $\sin(\theta) \,\$
If $\csc(\theta)=1/x, \,\$ then what does $x \,\$ equal?
Prove $\tan^2(\theta)+1=\sec^2(\theta) \,\$ using $\,\ \sin^2(\theta)+ \cos^2 (\theta)=1$
- Find the double angle idenities for the cosine function using the above rule.
- Find the half angle idenities from the double angle idenities.
- Find the value of $\,\ \cos^2(\theta)$ without exponents using the above rules
- (Challenge) Find the value of $\,\ \cos^3(\theta)$ without exponents