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If value of CosA=4/13 and TanB=-15/8 then find the value of A+B

If value of CosA=4/13 and TanB=-15/8 then find the value of A+B

Grade:11

1 Answers

somi teez
105 Points
4 years ago
hi,
i think u need some hint ….anden you can solve it yourself ...ok
cos A is given find sin A Using sin A= sqrt (1- cos^2 a)
then tan B is given calculate sin B and cos B.
then use the formula sin (A+ B)=sin A* cos B +cos A * sin B
then you can easily calculate …...
BEST OF LUCK !!1
please approve if i am right 

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