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cos theta = - (sqrt(5))/6 where pi <= theta <= (3pi)/2; tan beta = 4/3 where 0 <= beta <= pi/2 What is the exact value of sin(theta + beta)? Enter your answer as a fraction in simplified form.

 May 15, 2021
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Here's a hint:

sin(x+y) = sin(x)cos(y) + cos(x)sin(y)

cos^2(x)+sin^2(x) = 1

tan(x) = sin(x)/cos(x)

 

=^._.^=

 May 15, 2021

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