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how do i prove this using trig identity: (2sinx+3cosx)^2+(3sinx2cosx)^2=13
 one year ago
 one year ago
how do i prove this using trig identity: (2sinx+3cosx)^2+(3sinx2cosx)^2=13
 one year ago
 one year ago

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jennyjewell25Best ResponseYou've already chosen the best response.0
i did this on my calculator type it in your calulator just as your type on here tell me what you get
 one year ago

sabika13Best ResponseYou've already chosen the best response.0
i have to prove it using trigonometric identity without a calculator
 one year ago

wioBest ResponseYou've already chosen the best response.0
First, use foil to expand them. Then use the following identity \[ \sin^2(\theta)+\cos^2(\theta)=1 \]
 one year ago

sabika13Best ResponseYou've already chosen the best response.0
what do i do with the leading coefficients?
 one year ago
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